RFC 3339 vs ISO 8601

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Format Listing

Notes:

This table is not exhaustive.
This page targets ISO 8601-1:2019. Previous editions and drafts contain key differences.
ISO 8601-2:2019 contains additional representations including sub-year groupings (e.g. for seasons); grouped units; sets; uncertainty qualifications; and date arithmetic. These are not yet represented on this page.
RFC 3339 suggests other characters could be specified to replace the T in downstream standards but only gives a space character as an example.
RFC 3339 is case-insensitive so every T or Z could also be t or z respectively. Previous editions of ISO 8601 were also case-insensitive.
ISO 8601 allows decimal fractions of the smallest time value. These are mostly represented here by a single fractional digit but the standard allows arbitrary precision.
ISO 8601 allows commas and dots for decimal separation but they are interchangeable in all formats.
ISO 8601-1:2019 permits omitting the T in the time of day representations (Times) when unambiguous.
However, a T is always required in date and time of day representations (Date-Times).
Previous editions also allowed omitting the T in Date-Times but it was never permitted to insert alternative characters (e.g. space or underscore).
Each standard defines multiple formats for different purposes. Other formats are therefore discouraged.
The format key is given below the table.

Format	Now	RFC 3339	ISO 8601
Dates
`%Y-%M-%D`	2025-04-03	✔️	✔️
`%C`	20		✔️
`%X`	202		✔️
`%Y`	2025		✔️
`%Y-%M`	2025-04		✔️
`%Y-%O`	2025-093		✔️
`%V-W%W`	2025-W14		✔️
`%V-W%W-%w`	2025-W14-4		✔️
`%Y%M%D`	20250403		✔️
`%Y%O`	2025093		✔️
`%VW%W`	2025W14		✔️
`%VW%W%w`	2025W144		✔️
Times
`%h:%m:%s%Z:%z`	01:15:22+00:00	✔️	✔️
`%h:%m:%.1s%Z:%z`	01:15:22.6+00:00	✔️	✔️
`%h:%m:%.2s%Z:%z`	01:15:22.66+00:00	✔️	✔️
`%h:%m:%.3s%Z:%z`	01:15:22.666+00:00	✔️	✔️
`%h:%m:%s.%u%Z:%z`	01:15:22.666140+00:00	✔️	✔️
`%h:%m:%s.%n%Z:%z`	01:15:22.666140394+00:00	✔️	✔️
`%h:%m:%sZ`	01:15:22Z	✔️	✔️
`%h:%m:%.1sZ`	01:15:22.6Z	✔️	✔️
`%h:%m:%.2sZ`	01:15:22.66Z	✔️	✔️
`%h:%m:%.3sZ`	01:15:22.666Z	✔️	✔️
`%h:%m:%s.%uZ`	01:15:22.666140Z	✔️	✔️
`%h:%m:%s.%nZ`	01:15:22.666140394Z	✔️	✔️
`%h:%m:%s+00:00`	01:15:22+00:00	✔️	✔️
`%h:%m:%.1s+00:00`	01:15:22.6+00:00	✔️	✔️
`%h:%m:%.2s+00:00`	01:15:22.66+00:00	✔️	✔️
`%h:%m:%.3s+00:00`	01:15:22.666+00:00	✔️	✔️
`%h:%m:%s.%u+00:00`	01:15:22.666140+00:00	✔️	✔️
`%h:%m:%s.%n+00:00`	01:15:22.666140394+00:00	✔️	✔️
`%h:%m:%s-00:00`	01:15:22-00:00	✔️
`%h:%m:%.1s-00:00`	01:15:22.6-00:00	✔️
`%h:%m:%.3s-00:00`	01:15:22.666-00:00	✔️
`%h:%m:%s.%u-00:00`	01:15:22.666140-00:00	✔️
`%h`	01		✔️
`%,1h`	01,2		✔️
`%.1h`	01.2		✔️
`%h:%m`	01:15		✔️
`%h:%,1m`	01:15,3		✔️
`%h:%.1m`	01:15.3		✔️
`%h:%m:%s`	01:15:22		✔️
`%h:%m:%.1s`	01:15:22.6		✔️
`%h:%m:%.2s`	01:15:22.66		✔️
`%h:%m:%,3s`	01:15:22,666		✔️
`%h:%m:%.3s`	01:15:22.666		✔️
`%h:%m:%s,%u`	01:15:22,666140		✔️
`%h:%m:%s.%u`	01:15:22.666140		✔️
`%h:%m:%s.%n`	01:15:22.666140394		✔️
`%h:%m:%s,%n`	01:15:22,666140394		✔️
`%hZ`	01Z		✔️
`%,1hZ`	01,2Z		✔️
`%.1hZ`	01.2Z		✔️
`%h:%mZ`	01:15Z		✔️
`%h:%,1mZ`	01:15,3Z		✔️
`%h:%.1mZ`	01:15.3Z		✔️
`%h:%m:%,3sZ`	01:15:22,666Z		✔️
`%h:%m:%s,%uZ`	01:15:22,666140Z		✔️
`%h:%m:%s,%nZ`	01:15:22,666140394Z		✔️
`%h%Z`	01+00		✔️
`%,1h%Z`	01,2+00		✔️
`%.1h%Z`	01.2+00		✔️
`%h:%m%Z`	01:15+00		✔️
`%h:%,1m%Z`	01:15,3+00		✔️
`%h:%.1m%Z`	01:15.3+00		✔️
`%h:%m:%s%Z`	01:15:22+00		✔️
`%h:%m:%.1s%Z`	01:15:22.6+00		✔️
`%h:%m:%.2s%Z`	01:15:22.66+00		✔️
`%h:%m:%,3s%Z`	01:15:22,666+00		✔️
`%h:%m:%.3s%Z`	01:15:22.666+00		✔️
`%h:%m:%s,%u%Z`	01:15:22,666140+00		✔️
`%h:%m:%s.%u%Z`	01:15:22.666140+00		✔️
`%h:%m:%s.%n%Z`	01:15:22.666140394+00		✔️
`%h:%m:%s,%n%Z`	01:15:22,666140394+00		✔️
`%h%Z:%z`	01+00:00		✔️
`%,1h%Z:%z`	01,2+00:00		✔️
`%.1h%Z:%z`	01.2+00:00		✔️
`%h:%m%Z:%z`	01:15+00:00		✔️
`%h:%,1m%Z:%z`	01:15,3+00:00		✔️
`%h:%.1m%Z:%z`	01:15.3+00:00		✔️
`%h:%m:%,3s%Z:%z`	01:15:22,666+00:00		✔️
`%h:%m:%s,%u%Z:%z`	01:15:22,666140+00:00		✔️
`%h:%m:%s,%n%Z:%z`	01:15:22,666140394+00:00		✔️
`T%h`	T01		✔️
`T%,1h`	T01,2		✔️
`T%.1h`	T01.2		✔️
`T%h:%m`	T01:15		✔️
`T%h:%,1m`	T01:15,3		✔️
`T%h:%.1m`	T01:15.3		✔️
`T%h:%m:%s`	T01:15:22		✔️
`T%h:%m:%.1s`	T01:15:22.6		✔️
`T%h:%m:%.2s`	T01:15:22.66		✔️
`T%h:%m:%,3s`	T01:15:22,666		✔️
`T%h:%m:%.3s`	T01:15:22.666		✔️
`T%h:%m:%s,%u`	T01:15:22,666140		✔️
`T%h:%m:%s.%u`	T01:15:22.666140		✔️
`T%h:%m:%s.%n`	T01:15:22.666140394		✔️
`T%h:%m:%s,%n`	T01:15:22,666140394		✔️
`T%hZ`	T01Z		✔️
`T%,1hZ`	T01,2Z		✔️
`T%.1hZ`	T01.2Z		✔️
`T%h:%mZ`	T01:15Z		✔️
`T%h:%,1mZ`	T01:15,3Z		✔️
`T%h:%.1mZ`	T01:15.3Z		✔️
`T%h:%m:%sZ`	T01:15:22Z		✔️
`T%h:%m:%.1sZ`	T01:15:22.6Z		✔️
`T%h:%m:%.2sZ`	T01:15:22.66Z		✔️
`T%h:%m:%,3sZ`	T01:15:22,666Z		✔️
`T%h:%m:%.3sZ`	T01:15:22.666Z		✔️
`T%h:%m:%s,%uZ`	T01:15:22,666140Z		✔️
`T%h:%m:%s.%uZ`	T01:15:22.666140Z		✔️
`T%h:%m:%s.%nZ`	T01:15:22.666140394Z		✔️
`T%h:%m:%s,%nZ`	T01:15:22,666140394Z		✔️
`T%h%Z`	T01+00		✔️
`T%,1h%Z`	T01,2+00		✔️
`T%.1h%Z`	T01.2+00		✔️
`T%h:%m%Z`	T01:15+00		✔️
`T%h:%,1m%Z`	T01:15,3+00		✔️
`T%h:%.1m%Z`	T01:15.3+00		✔️
`T%h:%m:%s%Z`	T01:15:22+00		✔️
`T%h:%m:%.1s%Z`	T01:15:22.6+00		✔️
`T%h:%m:%.2s%Z`	T01:15:22.66+00		✔️
`T%h:%m:%,3s%Z`	T01:15:22,666+00		✔️
`T%h:%m:%.3s%Z`	T01:15:22.666+00		✔️
`T%h:%m:%s,%u%Z`	T01:15:22,666140+00		✔️
`T%h:%m:%s.%u%Z`	T01:15:22.666140+00		✔️
`T%h:%m:%s.%n%Z`	T01:15:22.666140394+00		✔️
`T%h:%m:%s,%n%Z`	T01:15:22,666140394+00		✔️
`T%h%Z:%z`	T01+00:00		✔️
`T%,1h%Z:%z`	T01,2+00:00		✔️
`T%.1h%Z:%z`	T01.2+00:00		✔️
`T%h:%m%Z:%z`	T01:15+00:00		✔️
`T%h:%,1m%Z:%z`	T01:15,3+00:00		✔️
`T%h:%.1m%Z:%z`	T01:15.3+00:00		✔️
`T%h:%m:%s%Z:%z`	T01:15:22+00:00		✔️
`T%h:%m:%.1s%Z:%z`	T01:15:22.6+00:00		✔️
`T%h:%m:%.2s%Z:%z`	T01:15:22.66+00:00		✔️
`T%h:%m:%,3s%Z:%z`	T01:15:22,666+00:00		✔️
`T%h:%m:%.3s%Z:%z`	T01:15:22.666+00:00		✔️
`T%h:%m:%s,%u%Z:%z`	T01:15:22,666140+00:00		✔️
`T%h:%m:%s.%u%Z:%z`	T01:15:22.666140+00:00		✔️
`T%h:%m:%s.%n%Z:%z`	T01:15:22.666140394+00:00		✔️
`T%h:%m:%s,%n%Z:%z`	T01:15:22,666140394+00:00		✔️
`%h%m`	0115		✔️
`%h%,1m`	0115,3		✔️
`%h%.1m`	0115.3		✔️
`%h%m%s`	011522		✔️
`%h%m%.1s`	011522.6		✔️
`%h%m%.2s`	011522.66		✔️
`%h%m%,3s`	011522,666		✔️
`%h%m%.3s`	011522.666		✔️
`%h%m%s,%u`	011522,666140		✔️
`%h%m%s.%u`	011522.666140		✔️
`%h%m%s.%n`	011522.666140394		✔️
`%h%m%s,%n`	011522,666140394		✔️
`%h%mZ`	0115Z		✔️
`%h%,1mZ`	0115,3Z		✔️
`%h%.1mZ`	0115.3Z		✔️
`%h%m%sZ`	011522Z		✔️
`%h%m%.1sZ`	011522.6Z		✔️
`%h%m%.2sZ`	011522.66Z		✔️
`%h%m%,3sZ`	011522,666Z		✔️
`%h%m%.3sZ`	011522.666Z		✔️
`%h%m%s,%uZ`	011522,666140Z		✔️
`%h%m%s.%uZ`	011522.666140Z		✔️
`%h%m%s.%nZ`	011522.666140394Z		✔️
`%h%m%s,%nZ`	011522,666140394Z		✔️
`%h%m%Z`	0115+00		✔️
`%h%,1m%Z`	0115,3+00		✔️
`%h%.1m%Z`	0115.3+00		✔️
`%h%m%s%Z`	011522+00		✔️
`%h%m%.1s%Z`	011522.6+00		✔️
`%h%m%.2s%Z`	011522.66+00		✔️
`%h%m%,3s%Z`	011522,666+00		✔️
`%h%m%.3s%Z`	011522.666+00		✔️
`%h%m%s,%u%Z`	011522,666140+00		✔️
`%h%m%s.%u%Z`	011522.666140+00		✔️
`%h%m%s.%n%Z`	011522.666140394+00		✔️
`%h%m%s,%n%Z`	011522,666140394+00		✔️
`%h%Z%z`	01+0000		✔️
`%,1h%Z%z`	01,2+0000		✔️
`%.1h%Z%z`	01.2+0000		✔️
`%h%m%Z%z`	0115+0000		✔️
`%h%,1m%Z%z`	0115,3+0000		✔️
`%h%.1m%Z%z`	0115.3+0000		✔️
`%h%m%s%Z%z`	011522+0000		✔️
`%h%m%.1s%Z%z`	011522.6+0000		✔️
`%h%m%.2s%Z%z`	011522.66+0000		✔️
`%h%m%,3s%Z%z`	011522,666+0000		✔️
`%h%m%.3s%Z%z`	011522.666+0000		✔️
`%h%m%s,%u%Z%z`	011522,666140+0000		✔️
`%h%m%s.%u%Z%z`	011522.666140+0000		✔️
`%h%m%s.%n%Z%z`	011522.666140394+0000		✔️
`%h%m%s,%n%Z%z`	011522,666140394+0000		✔️
`T%h%m`	T0115		✔️
`T%h%,1m`	T0115,3		✔️
`T%h%.1m`	T0115.3		✔️
`T%h%m%s`	T011522		✔️
`T%h%m%.1s`	T011522.6		✔️
`T%h%m%.2s`	T011522.66		✔️
`T%h%m%,3s`	T011522,666		✔️
`T%h%m%.3s`	T011522.666		✔️
`T%h%m%s,%u`	T011522,666140		✔️
`T%h%m%s.%u`	T011522.666140		✔️
`T%h%m%s.%n`	T011522.666140394		✔️
`T%h%m%s,%n`	T011522,666140394		✔️
`T%h%mZ`	T0115Z		✔️
`T%h%,1mZ`	T0115,3Z		✔️
`T%h%.1mZ`	T0115.3Z		✔️
`T%h%m%sZ`	T011522Z		✔️
`T%h%m%.1sZ`	T011522.6Z		✔️
`T%h%m%.2sZ`	T011522.66Z		✔️
`T%h%m%,3sZ`	T011522,666Z		✔️
`T%h%m%.3sZ`	T011522.666Z		✔️
`T%h%m%s,%uZ`	T011522,666140Z		✔️
`T%h%m%s.%uZ`	T011522.666140Z		✔️
`T%h%m%s.%nZ`	T011522.666140394Z		✔️
`T%h%m%s,%nZ`	T011522,666140394Z		✔️
`T%h%m%Z`	T0115+00		✔️
`T%h%,1m%Z`	T0115,3+00		✔️
`T%h%.1m%Z`	T0115.3+00		✔️
`T%h%m%s%Z`	T011522+00		✔️
`T%h%m%.1s%Z`	T011522.6+00		✔️
`T%h%m%.2s%Z`	T011522.66+00		✔️
`T%h%m%,3s%Z`	T011522,666+00		✔️
`T%h%m%.3s%Z`	T011522.666+00		✔️
`T%h%m%s,%u%Z`	T011522,666140+00		✔️
`T%h%m%s.%u%Z`	T011522.666140+00		✔️
`T%h%m%s.%n%Z`	T011522.666140394+00		✔️
`T%h%m%s,%n%Z`	T011522,666140394+00		✔️
`T%h%Z%z`	T01+0000		✔️
`T%,1h%Z%z`	T01,2+0000		✔️
`T%.1h%Z%z`	T01.2+0000		✔️
`T%h%m%Z%z`	T0115+0000		✔️
`T%h%,1m%Z%z`	T0115,3+0000		✔️
`T%h%.1m%Z%z`	T0115.3+0000		✔️
`T%h%m%s%Z%z`	T011522+0000		✔️
`T%h%m%.1s%Z%z`	T011522.6+0000		✔️
`T%h%m%.2s%Z%z`	T011522.66+0000		✔️
`T%h%m%,3s%Z%z`	T011522,666+0000		✔️
`T%h%m%.3s%Z%z`	T011522.666+0000		✔️
`T%h%m%s,%u%Z%z`	T011522,666140+0000		✔️
`T%h%m%s.%u%Z%z`	T011522.666140+0000		✔️
`T%h%m%s.%n%Z%z`	T011522.666140394+0000		✔️
`T%h%m%s,%n%Z%z`	T011522,666140394+0000		✔️
Date-Times
`%Y-%M-%DT%h:%m:%sZ`	2025-04-03T01:15:22Z	✔️	✔️
`%Y-%M-%DT%h:%m:%.1sZ`	2025-04-03T01:15:22.6Z	✔️	✔️
`%Y-%M-%DT%h:%m:%.2sZ`	2025-04-03T01:15:22.66Z	✔️	✔️
`%Y-%M-%DT%h:%m:%.3sZ`	2025-04-03T01:15:22.666Z	✔️	✔️
`%Y-%M-%DT%h:%m:%s.%uZ`	2025-04-03T01:15:22.666140Z	✔️	✔️
`%Y-%M-%DT%h:%m:%s.%nZ`	2025-04-03T01:15:22.666140394Z	✔️	✔️
`%Y-%M-%Dt%h:%m:%sz`	2025-04-03t01:15:22z	✔️
`%Y-%M-%Dt%h:%m:%.3sz`	2025-04-03t01:15:22.666z	✔️
`%Y-%M-%DT%h:%m:%s%Z:%z`	2025-04-03T01:15:22+00:00	✔️	✔️
`%Y-%M-%DT%h:%m:%.1s%Z:%z`	2025-04-03T01:15:22.6+00:00	✔️	✔️
`%Y-%M-%DT%h:%m:%.2s%Z:%z`	2025-04-03T01:15:22.66+00:00	✔️	✔️
`%Y-%M-%DT%h:%m:%.3s%Z:%z`	2025-04-03T01:15:22.666+00:00	✔️	✔️
`%Y-%M-%DT%h:%m:%s.%u%Z:%z`	2025-04-03T01:15:22.666140+00:00	✔️	✔️
`%Y-%M-%DT%h:%m:%s.%n%Z:%z`	2025-04-03T01:15:22.666140394+00:00	✔️	✔️
`%Y-%M-%D %h:%m:%s%Z:%z`	2025-04-03 01:15:22+00:00	✔️
`%Y-%M-%D %h:%m:%.1s%Z:%z`	2025-04-03 01:15:22.6+00:00	✔️
`%Y-%M-%D %h:%m:%.2s%Z:%z`	2025-04-03 01:15:22.66+00:00	✔️
`%Y-%M-%D %h:%m:%.3s%Z:%z`	2025-04-03 01:15:22.666+00:00	✔️
`%Y-%M-%D %h:%m:%s.%u%Z:%z`	2025-04-03 01:15:22.666140+00:00	✔️
`%Y-%M-%D %h:%m:%s.%n%Z:%z`	2025-04-03 01:15:22.666140394+00:00	✔️
`%Y-%M-%D %h:%m:%sZ`	2025-04-03 01:15:22Z	✔️
`%Y-%M-%D_%h:%m:%sZ`	2025-04-03_01:15:22Z	✔️
`%Y-%M-%D %h:%m:%sz`	2025-04-03 01:15:22z	✔️
`%Y-%M-%D_%h:%m:%sz`	2025-04-03_01:15:22z	✔️
`%Y-%M-%D %h:%m:%.1sZ`	2025-04-03 01:15:22.6Z	✔️
`%Y-%M-%D %h:%m:%.2sZ`	2025-04-03 01:15:22.66Z	✔️
`%Y-%M-%D %h:%m:%.3sZ`	2025-04-03 01:15:22.666Z	✔️
`%Y-%M-%D_%h:%m:%.3sZ`	2025-04-03_01:15:22.666Z	✔️
`%Y-%M-%D %h:%m:%s.%uZ`	2025-04-03 01:15:22.666140Z	✔️
`%Y-%M-%D_%h:%m:%s.%uZ`	2025-04-03_01:15:22.666140Z	✔️
`%Y-%M-%D %h:%m:%.3sz`	2025-04-03 01:15:22.666z	✔️
`%Y-%M-%D_%h:%m:%.3sz`	2025-04-03_01:15:22.666z	✔️
`%Y-%M-%D %h:%m:%s.%uz`	2025-04-03 01:15:22.666140z	✔️
`%Y-%M-%D_%h:%m:%s.%uz`	2025-04-03_01:15:22.666140z	✔️
`%Y-%M-%D %h:%m:%s-00:00`	2025-04-03 01:15:22-00:00	✔️
`%Y-%M-%D %h:%m:%.3s-00:00`	2025-04-03 01:15:22.666-00:00	✔️
`%Y-%M-%DT%h:%m:%s-00:00`	2025-04-03T01:15:22-00:00	✔️
`%Y-%M-%DT%h:%m:%.3s-00:00`	2025-04-03T01:15:22.666-00:00	✔️
`%Y-%M-%DT%h:%m:%s+08:45`	2025-04-03T10:00:22+08:45	✔️	✔️
`%Y-%M-%DT%h:%m:%s+00:00`	2025-04-03T01:15:22+00:00	✔️	✔️
`%Y-%M-%DT%h:%m:%.2s+00:00`	2025-04-03T01:15:22.66+00:00	✔️
`%Y-%M-%DT%h:%m:%.3s+00:00`	2025-04-03T01:15:22.666+00:00	✔️	✔️
`%Y-%M-%DT%h`	2025-04-03T01		✔️
`%Y-%M-%DT%,1h`	2025-04-03T01,2		✔️
`%Y-%M-%DT%.1h`	2025-04-03T01.2		✔️
`%Y-%M-%DT%h:%m`	2025-04-03T01:15		✔️
`%Y-%M-%DT%h:%,1m`	2025-04-03T01:15,3		✔️
`%Y-%M-%DT%h:%.1m`	2025-04-03T01:15.3		✔️
`%Y-%M-%DT%h:%m:%s`	2025-04-03T01:15:22		✔️
`%Y-%M-%DT%h:%m:%.1s`	2025-04-03T01:15:22.6		✔️
`%Y-%M-%DT%h:%m:%.2s`	2025-04-03T01:15:22.66		✔️
`%Y-%M-%DT%h:%m:%,3s`	2025-04-03T01:15:22,666		✔️
`%Y-%M-%DT%h:%m:%.3s`	2025-04-03T01:15:22.666		✔️
`%Y-%M-%DT%h:%m:%s,%u`	2025-04-03T01:15:22,666140		✔️
`%Y-%M-%DT%h:%m:%s.%u`	2025-04-03T01:15:22.666140		✔️
`%Y-%M-%DT%h:%m:%s.%n`	2025-04-03T01:15:22.666140394		✔️
`%Y-%M-%DT%h:%m:%s,%n`	2025-04-03T01:15:22,666140394		✔️
`%Y-%M-%DT%hZ`	2025-04-03T01Z		✔️
`%Y-%M-%DT%,1hZ`	2025-04-03T01,2Z		✔️
`%Y-%M-%DT%.1hZ`	2025-04-03T01.2Z		✔️
`%Y-%M-%DT%h:%mZ`	2025-04-03T01:15Z		✔️
`%Y-%M-%DT%h:%,1mZ`	2025-04-03T01:15,3Z		✔️
`%Y-%M-%DT%h:%.1mZ`	2025-04-03T01:15.3Z		✔️
`%Y-%M-%DT%h:%m:%,3sZ`	2025-04-03T01:15:22,666Z		✔️
`%Y-%M-%DT%h:%m:%s,%uZ`	2025-04-03T01:15:22,666140Z		✔️
`%Y-%M-%DT%h:%m:%s,%nZ`	2025-04-03T01:15:22,666140394Z		✔️
`%Y-%M-%DT%h%Z`	2025-04-03T01+00		✔️
`%Y-%M-%DT%,1h%Z`	2025-04-03T01,2+00		✔️
`%Y-%M-%DT%.1h%Z`	2025-04-03T01.2+00		✔️
`%Y-%M-%DT%h:%m%Z`	2025-04-03T01:15+00		✔️
`%Y-%M-%DT%h:%,1m%Z`	2025-04-03T01:15,3+00		✔️
`%Y-%M-%DT%h:%.1m%Z`	2025-04-03T01:15.3+00		✔️
`%Y-%M-%DT%h:%m:%s%Z`	2025-04-03T01:15:22+00		✔️
`%Y-%M-%DT%h:%m:%.1s%Z`	2025-04-03T01:15:22.6+00		✔️
`%Y-%M-%DT%h:%m:%.2s%Z`	2025-04-03T01:15:22.66+00		✔️
`%Y-%M-%DT%h:%m:%,3s%Z`	2025-04-03T01:15:22,666+00		✔️
`%Y-%M-%DT%h:%m:%.3s%Z`	2025-04-03T01:15:22.666+00		✔️
`%Y-%M-%DT%h:%m:%s,%u%Z`	2025-04-03T01:15:22,666140+00		✔️
`%Y-%M-%DT%h:%m:%s.%u%Z`	2025-04-03T01:15:22.666140+00		✔️
`%Y-%M-%DT%h:%m:%s.%n%Z`	2025-04-03T01:15:22.666140394+00		✔️
`%Y-%M-%DT%h:%m:%s,%n%Z`	2025-04-03T01:15:22,666140394+00		✔️
`%Y-%M-%DT%h%Z:%z`	2025-04-03T01+00:00		✔️
`%Y-%M-%DT%,1h%Z:%z`	2025-04-03T01,2+00:00		✔️
`%Y-%M-%DT%.1h%Z:%z`	2025-04-03T01.2+00:00		✔️
`%Y-%M-%DT%h:%m%Z:%z`	2025-04-03T01:15+00:00		✔️
`%Y-%M-%DT%h:%,1m%Z:%z`	2025-04-03T01:15,3+00:00		✔️
`%Y-%M-%DT%h:%.1m%Z:%z`	2025-04-03T01:15.3+00:00		✔️
`%Y-%M-%DT%h:%m:%,3s%Z:%z`	2025-04-03T01:15:22,666+00:00		✔️
`%Y-%M-%DT%h:%m:%s,%u%Z:%z`	2025-04-03T01:15:22,666140+00:00		✔️
`%Y-%M-%DT%h:%m:%s,%n%Z:%z`	2025-04-03T01:15:22,666140394+00:00		✔️
`%V-W%W-%wT%h`	2025-W14-4T01		✔️
`%V-W%W-%wT%,1h`	2025-W14-4T01,2		✔️
`%V-W%W-%wT%.1h`	2025-W14-4T01.2		✔️
`%V-W%W-%wT%h:%m`	2025-W14-4T01:15		✔️
`%V-W%W-%wT%h:%,1m`	2025-W14-4T01:15,3		✔️
`%V-W%W-%wT%h:%.1m`	2025-W14-4T01:15.3		✔️
`%V-W%W-%wT%h:%m:%s`	2025-W14-4T01:15:22		✔️
`%V-W%W-%wT%h:%m:%.1s`	2025-W14-4T01:15:22.6		✔️
`%V-W%W-%wT%h:%m:%.2s`	2025-W14-4T01:15:22.66		✔️
`%V-W%W-%wT%h:%m:%,3s`	2025-W14-4T01:15:22,666		✔️
`%V-W%W-%wT%h:%m:%.3s`	2025-W14-4T01:15:22.666		✔️
`%V-W%W-%wT%h:%m:%s,%u`	2025-W14-4T01:15:22,666140		✔️
`%V-W%W-%wT%h:%m:%s.%u`	2025-W14-4T01:15:22.666140		✔️
`%V-W%W-%wT%h:%m:%s.%n`	2025-W14-4T01:15:22.666140394		✔️
`%V-W%W-%wT%h:%m:%s,%n`	2025-W14-4T01:15:22,666140394		✔️
`%V-W%W-%wT%hZ`	2025-W14-4T01Z		✔️
`%V-W%W-%wT%,1hZ`	2025-W14-4T01,2Z		✔️
`%V-W%W-%wT%.1hZ`	2025-W14-4T01.2Z		✔️
`%V-W%W-%wT%h:%mZ`	2025-W14-4T01:15Z		✔️
`%V-W%W-%wT%h:%,1mZ`	2025-W14-4T01:15,3Z		✔️
`%V-W%W-%wT%h:%.1mZ`	2025-W14-4T01:15.3Z		✔️
`%V-W%W-%wT%h:%m:%sZ`	2025-W14-4T01:15:22Z		✔️
`%V-W%W-%wT%h:%m:%.1sZ`	2025-W14-4T01:15:22.6Z		✔️
`%V-W%W-%wT%h:%m:%.2sZ`	2025-W14-4T01:15:22.66Z		✔️
`%V-W%W-%wT%h:%m:%,3sZ`	2025-W14-4T01:15:22,666Z		✔️
`%V-W%W-%wT%h:%m:%.3sZ`	2025-W14-4T01:15:22.666Z		✔️
`%V-W%W-%wT%h:%m:%s,%uZ`	2025-W14-4T01:15:22,666140Z		✔️
`%V-W%W-%wT%h:%m:%s.%uZ`	2025-W14-4T01:15:22.666140Z		✔️
`%V-W%W-%wT%h:%m:%s.%nZ`	2025-W14-4T01:15:22.666140394Z		✔️
`%V-W%W-%wT%h:%m:%s,%nZ`	2025-W14-4T01:15:22,666140394Z		✔️
`%V-W%W-%wT%h%Z`	2025-W14-4T01+00		✔️
`%V-W%W-%wT%,1h%Z`	2025-W14-4T01,2+00		✔️
`%V-W%W-%wT%.1h%Z`	2025-W14-4T01.2+00		✔️
`%V-W%W-%wT%h:%m%Z`	2025-W14-4T01:15+00		✔️
`%V-W%W-%wT%h:%,1m%Z`	2025-W14-4T01:15,3+00		✔️
`%V-W%W-%wT%h:%.1m%Z`	2025-W14-4T01:15.3+00		✔️
`%V-W%W-%wT%h:%m:%s%Z`	2025-W14-4T01:15:22+00		✔️
`%V-W%W-%wT%h:%m:%.1s%Z`	2025-W14-4T01:15:22.6+00		✔️
`%V-W%W-%wT%h:%m:%.2s%Z`	2025-W14-4T01:15:22.66+00		✔️
`%V-W%W-%wT%h:%m:%,3s%Z`	2025-W14-4T01:15:22,666+00		✔️
`%V-W%W-%wT%h:%m:%.3s%Z`	2025-W14-4T01:15:22.666+00		✔️
`%V-W%W-%wT%h:%m:%s,%u%Z`	2025-W14-4T01:15:22,666140+00		✔️
`%V-W%W-%wT%h:%m:%s.%u%Z`	2025-W14-4T01:15:22.666140+00		✔️
`%V-W%W-%wT%h:%m:%s.%n%Z`	2025-W14-4T01:15:22.666140394+00		✔️
`%V-W%W-%wT%h:%m:%s,%n%Z`	2025-W14-4T01:15:22,666140394+00		✔️
`%V-W%W-%wT%h%Z:%z`	2025-W14-4T01+00:00		✔️
`%V-W%W-%wT%,1h%Z:%z`	2025-W14-4T01,2+00:00		✔️
`%V-W%W-%wT%.1h%Z:%z`	2025-W14-4T01.2+00:00		✔️
`%V-W%W-%wT%h:%m%Z:%z`	2025-W14-4T01:15+00:00		✔️
`%V-W%W-%wT%h:%,1m%Z:%z`	2025-W14-4T01:15,3+00:00		✔️
`%V-W%W-%wT%h:%.1m%Z:%z`	2025-W14-4T01:15.3+00:00		✔️
`%V-W%W-%wT%h:%m:%s%Z:%z`	2025-W14-4T01:15:22+00:00		✔️
`%V-W%W-%wT%h:%m:%.1s%Z:%z`	2025-W14-4T01:15:22.6+00:00		✔️
`%V-W%W-%wT%h:%m:%.2s%Z:%z`	2025-W14-4T01:15:22.66+00:00		✔️
`%V-W%W-%wT%h:%m:%,3s%Z:%z`	2025-W14-4T01:15:22,666+00:00		✔️
`%V-W%W-%wT%h:%m:%.3s%Z:%z`	2025-W14-4T01:15:22.666+00:00		✔️
`%V-W%W-%wT%h:%m:%s,%u%Z:%z`	2025-W14-4T01:15:22,666140+00:00		✔️
`%V-W%W-%wT%h:%m:%s.%u%Z:%z`	2025-W14-4T01:15:22.666140+00:00		✔️
`%V-W%W-%wT%h:%m:%s.%n%Z:%z`	2025-W14-4T01:15:22.666140394+00:00		✔️
`%V-W%W-%wT%h:%m:%s,%n%Z:%z`	2025-W14-4T01:15:22,666140394+00:00		✔️
`%Y-%OT%h`	2025-093T01		✔️
`%Y-%OT%,1h`	2025-093T01,2		✔️
`%Y-%OT%.1h`	2025-093T01.2		✔️
`%Y-%OT%h:%m`	2025-093T01:15		✔️
`%Y-%OT%h:%,1m`	2025-093T01:15,3		✔️
`%Y-%OT%h:%.1m`	2025-093T01:15.3		✔️
`%Y-%OT%h:%m:%s`	2025-093T01:15:22		✔️
`%Y-%OT%h:%m:%.1s`	2025-093T01:15:22.6		✔️
`%Y-%OT%h:%m:%.2s`	2025-093T01:15:22.66		✔️
`%Y-%OT%h:%m:%,3s`	2025-093T01:15:22,666		✔️
`%Y-%OT%h:%m:%.3s`	2025-093T01:15:22.666		✔️
`%Y-%OT%h:%m:%s,%u`	2025-093T01:15:22,666140		✔️
`%Y-%OT%h:%m:%s.%u`	2025-093T01:15:22.666140		✔️
`%Y-%OT%h:%m:%s.%n`	2025-093T01:15:22.666140394		✔️
`%Y-%OT%h:%m:%s,%n`	2025-093T01:15:22,666140394		✔️
`%Y-%OT%hZ`	2025-093T01Z		✔️
`%Y-%OT%,1hZ`	2025-093T01,2Z		✔️
`%Y-%OT%.1hZ`	2025-093T01.2Z		✔️
`%Y-%OT%h:%mZ`	2025-093T01:15Z		✔️
`%Y-%OT%h:%,1mZ`	2025-093T01:15,3Z		✔️
`%Y-%OT%h:%.1mZ`	2025-093T01:15.3Z		✔️
`%Y-%OT%h:%m:%sZ`	2025-093T01:15:22Z		✔️
`%Y-%OT%h:%m:%.1sZ`	2025-093T01:15:22.6Z		✔️
`%Y-%OT%h:%m:%.2sZ`	2025-093T01:15:22.66Z		✔️
`%Y-%OT%h:%m:%,3sZ`	2025-093T01:15:22,666Z		✔️
`%Y-%OT%h:%m:%.3sZ`	2025-093T01:15:22.666Z		✔️
`%Y-%OT%h:%m:%s,%uZ`	2025-093T01:15:22,666140Z		✔️
`%Y-%OT%h:%m:%s.%uZ`	2025-093T01:15:22.666140Z		✔️
`%Y-%OT%h:%m:%s.%nZ`	2025-093T01:15:22.666140394Z		✔️
`%Y-%OT%h:%m:%s,%nZ`	2025-093T01:15:22,666140394Z		✔️
`%Y-%OT%h%Z`	2025-093T01+00		✔️
`%Y-%OT%,1h%Z`	2025-093T01,2+00		✔️
`%Y-%OT%.1h%Z`	2025-093T01.2+00		✔️
`%Y-%OT%h:%m%Z`	2025-093T01:15+00		✔️
`%Y-%OT%h:%,1m%Z`	2025-093T01:15,3+00		✔️
`%Y-%OT%h:%.1m%Z`	2025-093T01:15.3+00		✔️
`%Y-%OT%h:%m:%s%Z`	2025-093T01:15:22+00		✔️
`%Y-%OT%h:%m:%.1s%Z`	2025-093T01:15:22.6+00		✔️
`%Y-%OT%h:%m:%.2s%Z`	2025-093T01:15:22.66+00		✔️
`%Y-%OT%h:%m:%,3s%Z`	2025-093T01:15:22,666+00		✔️
`%Y-%OT%h:%m:%.3s%Z`	2025-093T01:15:22.666+00		✔️
`%Y-%OT%h:%m:%s,%u%Z`	2025-093T01:15:22,666140+00		✔️
`%Y-%OT%h:%m:%s.%u%Z`	2025-093T01:15:22.666140+00		✔️
`%Y-%OT%h:%m:%s.%n%Z`	2025-093T01:15:22.666140394+00		✔️
`%Y-%OT%h:%m:%s,%n%Z`	2025-093T01:15:22,666140394+00		✔️
`%Y-%OT%h%Z:%z`	2025-093T01+00:00		✔️
`%Y-%OT%,1h%Z:%z`	2025-093T01,2+00:00		✔️
`%Y-%OT%.1h%Z:%z`	2025-093T01.2+00:00		✔️
`%Y-%OT%h:%m%Z:%z`	2025-093T01:15+00:00		✔️
`%Y-%OT%h:%,1m%Z:%z`	2025-093T01:15,3+00:00		✔️
`%Y-%OT%h:%.1m%Z:%z`	2025-093T01:15.3+00:00		✔️
`%Y-%OT%h:%m:%s%Z:%z`	2025-093T01:15:22+00:00		✔️
`%Y-%OT%h:%m:%.1s%Z:%z`	2025-093T01:15:22.6+00:00		✔️
`%Y-%OT%h:%m:%.2s%Z:%z`	2025-093T01:15:22.66+00:00		✔️
`%Y-%OT%h:%m:%,3s%Z:%z`	2025-093T01:15:22,666+00:00		✔️
`%Y-%OT%h:%m:%.3s%Z:%z`	2025-093T01:15:22.666+00:00		✔️
`%Y-%OT%h:%m:%s,%u%Z:%z`	2025-093T01:15:22,666140+00:00		✔️
`%Y-%OT%h:%m:%s.%u%Z:%z`	2025-093T01:15:22.666140+00:00		✔️
`%Y-%OT%h:%m:%s.%n%Z:%z`	2025-093T01:15:22.666140394+00:00		✔️
`%Y-%OT%h:%m:%s,%n%Z:%z`	2025-093T01:15:22,666140394+00:00		✔️
`%Y%M%DT%h`	20250403T01		✔️
`%Y%M%DT%,1h`	20250403T01,2		✔️
`%Y%M%DT%.1h`	20250403T01.2		✔️
`%Y%M%DT%h%m`	20250403T0115		✔️
`%Y%M%DT%h%,1m`	20250403T0115,3		✔️
`%Y%M%DT%h%.1m`	20250403T0115.3		✔️
`%Y%M%DT%h%m%s`	20250403T011522		✔️
`%Y%M%DT%h%m%.1s`	20250403T011522.6		✔️
`%Y%M%DT%h%m%.2s`	20250403T011522.66		✔️
`%Y%M%DT%h%m%,3s`	20250403T011522,666		✔️
`%Y%M%DT%h%m%.3s`	20250403T011522.666		✔️
`%Y%M%DT%h%m%s,%u`	20250403T011522,666140		✔️
`%Y%M%DT%h%m%s.%u`	20250403T011522.666140		✔️
`%Y%M%DT%h%m%s.%n`	20250403T011522.666140394		✔️
`%Y%M%DT%h%m%s,%n`	20250403T011522,666140394		✔️
`%Y%M%DT%hZ`	20250403T01Z		✔️
`%Y%M%DT%,1hZ`	20250403T01,2Z		✔️
`%Y%M%DT%.1hZ`	20250403T01.2Z		✔️
`%Y%M%DT%h%mZ`	20250403T0115Z		✔️
`%Y%M%DT%h%,1mZ`	20250403T0115,3Z		✔️
`%Y%M%DT%h%.1mZ`	20250403T0115.3Z		✔️
`%Y%M%DT%h%m%sZ`	20250403T011522Z		✔️
`%Y%M%DT%h%m%.1sZ`	20250403T011522.6Z		✔️
`%Y%M%DT%h%m%.2sZ`	20250403T011522.66Z		✔️
`%Y%M%DT%h%m%,3sZ`	20250403T011522,666Z		✔️
`%Y%M%DT%h%m%.3sZ`	20250403T011522.666Z		✔️
`%Y%M%DT%h%m%s,%uZ`	20250403T011522,666140Z		✔️
`%Y%M%DT%h%m%s.%uZ`	20250403T011522.666140Z		✔️
`%Y%M%DT%h%m%s.%nZ`	20250403T011522.666140394Z		✔️
`%Y%M%DT%h%m%s,%nZ`	20250403T011522,666140394Z		✔️
`%Y%M%DT%h%Z`	20250403T01+00		✔️
`%Y%M%DT%,1h%Z`	20250403T01,2+00		✔️
`%Y%M%DT%.1h%Z`	20250403T01.2+00		✔️
`%Y%M%DT%h%m%Z`	20250403T0115+00		✔️
`%Y%M%DT%h%,1m%Z`	20250403T0115,3+00		✔️
`%Y%M%DT%h%.1m%Z`	20250403T0115.3+00		✔️
`%Y%M%DT%h%m%s%Z`	20250403T011522+00		✔️
`%Y%M%DT%h%m%.1s%Z`	20250403T011522.6+00		✔️
`%Y%M%DT%h%m%.2s%Z`	20250403T011522.66+00		✔️
`%Y%M%DT%h%m%,3s%Z`	20250403T011522,666+00		✔️
`%Y%M%DT%h%m%.3s%Z`	20250403T011522.666+00		✔️
`%Y%M%DT%h%m%s,%u%Z`	20250403T011522,666140+00		✔️
`%Y%M%DT%h%m%s.%u%Z`	20250403T011522.666140+00		✔️
`%Y%M%DT%h%m%s.%n%Z`	20250403T011522.666140394+00		✔️
`%Y%M%DT%h%m%s,%n%Z`	20250403T011522,666140394+00		✔️
`%Y%M%DT%h%Z%z`	20250403T01+0000		✔️
`%Y%M%DT%,1h%Z%z`	20250403T01,2+0000		✔️
`%Y%M%DT%.1h%Z%z`	20250403T01.2+0000		✔️
`%Y%M%DT%h%m%Z%z`	20250403T0115+0000		✔️
`%Y%M%DT%h%,1m%Z%z`	20250403T0115,3+0000		✔️
`%Y%M%DT%h%.1m%Z%z`	20250403T0115.3+0000		✔️
`%Y%M%DT%h%m%s%Z%z`	20250403T011522+0000		✔️
`%Y%M%DT%h%m%.1s%Z%z`	20250403T011522.6+0000		✔️
`%Y%M%DT%h%m%.2s%Z%z`	20250403T011522.66+0000		✔️
`%Y%M%DT%h%m%,3s%Z%z`	20250403T011522,666+0000		✔️
`%Y%M%DT%h%m%.3s%Z%z`	20250403T011522.666+0000		✔️
`%Y%M%DT%h%m%s,%u%Z%z`	20250403T011522,666140+0000		✔️
`%Y%M%DT%h%m%s.%u%Z%z`	20250403T011522.666140+0000		✔️
`%Y%M%DT%h%m%s.%n%Z%z`	20250403T011522.666140394+0000		✔️
`%Y%M%DT%h%m%s,%n%Z%z`	20250403T011522,666140394+0000		✔️
`%VW%W%wT%h`	2025W144T01		✔️
`%VW%W%wT%,1h`	2025W144T01,2		✔️
`%VW%W%wT%.1h`	2025W144T01.2		✔️
`%VW%W%wT%h%m`	2025W144T0115		✔️
`%VW%W%wT%h%,1m`	2025W144T0115,3		✔️
`%VW%W%wT%h%.1m`	2025W144T0115.3		✔️
`%VW%W%wT%h%m%s`	2025W144T011522		✔️
`%VW%W%wT%h%m%.1s`	2025W144T011522.6		✔️
`%VW%W%wT%h%m%.2s`	2025W144T011522.66		✔️
`%VW%W%wT%h%m%,3s`	2025W144T011522,666		✔️
`%VW%W%wT%h%m%.3s`	2025W144T011522.666		✔️
`%VW%W%wT%h%m%s,%u`	2025W144T011522,666140		✔️
`%VW%W%wT%h%m%s.%u`	2025W144T011522.666140		✔️
`%VW%W%wT%h%m%s.%n`	2025W144T011522.666140394		✔️
`%VW%W%wT%h%m%s,%n`	2025W144T011522,666140394		✔️
`%VW%W%wT%hZ`	2025W144T01Z		✔️
`%VW%W%wT%,1hZ`	2025W144T01,2Z		✔️
`%VW%W%wT%.1hZ`	2025W144T01.2Z		✔️
`%VW%W%wT%h%mZ`	2025W144T0115Z		✔️
`%VW%W%wT%h%,1mZ`	2025W144T0115,3Z		✔️
`%VW%W%wT%h%.1mZ`	2025W144T0115.3Z		✔️
`%VW%W%wT%h%m%sZ`	2025W144T011522Z		✔️
`%VW%W%wT%h%m%.1sZ`	2025W144T011522.6Z		✔️
`%VW%W%wT%h%m%.2sZ`	2025W144T011522.66Z		✔️
`%VW%W%wT%h%m%,3sZ`	2025W144T011522,666Z		✔️
`%VW%W%wT%h%m%.3sZ`	2025W144T011522.666Z		✔️
`%VW%W%wT%h%m%s,%uZ`	2025W144T011522,666140Z		✔️
`%VW%W%wT%h%m%s.%uZ`	2025W144T011522.666140Z		✔️
`%VW%W%wT%h%m%s.%nZ`	2025W144T011522.666140394Z		✔️
`%VW%W%wT%h%m%s,%nZ`	2025W144T011522,666140394Z		✔️
`%VW%W%wT%h%Z`	2025W144T01+00		✔️
`%VW%W%wT%,1h%Z`	2025W144T01,2+00		✔️
`%VW%W%wT%.1h%Z`	2025W144T01.2+00		✔️
`%VW%W%wT%h%m%Z`	2025W144T0115+00		✔️
`%VW%W%wT%h%,1m%Z`	2025W144T0115,3+00		✔️
`%VW%W%wT%h%.1m%Z`	2025W144T0115.3+00		✔️
`%VW%W%wT%h%m%s%Z`	2025W144T011522+00		✔️
`%VW%W%wT%h%m%.1s%Z`	2025W144T011522.6+00		✔️
`%VW%W%wT%h%m%.2s%Z`	2025W144T011522.66+00		✔️
`%VW%W%wT%h%m%,3s%Z`	2025W144T011522,666+00		✔️
`%VW%W%wT%h%m%.3s%Z`	2025W144T011522.666+00		✔️
`%VW%W%wT%h%m%s,%u%Z`	2025W144T011522,666140+00		✔️
`%VW%W%wT%h%m%s.%u%Z`	2025W144T011522.666140+00		✔️
`%VW%W%wT%h%m%s.%n%Z`	2025W144T011522.666140394+00		✔️
`%VW%W%wT%h%m%s,%n%Z`	2025W144T011522,666140394+00		✔️
`%VW%W%wT%h%Z%z`	2025W144T01+0000		✔️
`%VW%W%wT%,1h%Z%z`	2025W144T01,2+0000		✔️
`%VW%W%wT%.1h%Z%z`	2025W144T01.2+0000		✔️
`%VW%W%wT%h%m%Z%z`	2025W144T0115+0000		✔️
`%VW%W%wT%h%,1m%Z%z`	2025W144T0115,3+0000		✔️
`%VW%W%wT%h%.1m%Z%z`	2025W144T0115.3+0000		✔️
`%VW%W%wT%h%m%s%Z%z`	2025W144T011522+0000		✔️
`%VW%W%wT%h%m%.1s%Z%z`	2025W144T011522.6+0000		✔️
`%VW%W%wT%h%m%.2s%Z%z`	2025W144T011522.66+0000		✔️
`%VW%W%wT%h%m%,3s%Z%z`	2025W144T011522,666+0000		✔️
`%VW%W%wT%h%m%.3s%Z%z`	2025W144T011522.666+0000		✔️
`%VW%W%wT%h%m%s,%u%Z%z`	2025W144T011522,666140+0000		✔️
`%VW%W%wT%h%m%s.%u%Z%z`	2025W144T011522.666140+0000		✔️
`%VW%W%wT%h%m%s.%n%Z%z`	2025W144T011522.666140394+0000		✔️
`%VW%W%wT%h%m%s,%n%Z%z`	2025W144T011522,666140394+0000		✔️
`%Y%OT%h`	2025093T01		✔️
`%Y%OT%,1h`	2025093T01,2		✔️
`%Y%OT%.1h`	2025093T01.2		✔️
`%Y%OT%h%m`	2025093T0115		✔️
`%Y%OT%h%,1m`	2025093T0115,3		✔️
`%Y%OT%h%.1m`	2025093T0115.3		✔️
`%Y%OT%h%m%s`	2025093T011522		✔️
`%Y%OT%h%m%.1s`	2025093T011522.6		✔️
`%Y%OT%h%m%.2s`	2025093T011522.66		✔️
`%Y%OT%h%m%,3s`	2025093T011522,666		✔️
`%Y%OT%h%m%.3s`	2025093T011522.666		✔️
`%Y%OT%h%m%s,%u`	2025093T011522,666140		✔️
`%Y%OT%h%m%s.%u`	2025093T011522.666140		✔️
`%Y%OT%h%m%s.%n`	2025093T011522.666140394		✔️
`%Y%OT%h%m%s,%n`	2025093T011522,666140394		✔️
`%Y%OT%hZ`	2025093T01Z		✔️
`%Y%OT%,1hZ`	2025093T01,2Z		✔️
`%Y%OT%.1hZ`	2025093T01.2Z		✔️
`%Y%OT%h%mZ`	2025093T0115Z		✔️
`%Y%OT%h%,1mZ`	2025093T0115,3Z		✔️
`%Y%OT%h%.1mZ`	2025093T0115.3Z		✔️
`%Y%OT%h%m%sZ`	2025093T011522Z		✔️
`%Y%OT%h%m%.1sZ`	2025093T011522.6Z		✔️
`%Y%OT%h%m%.2sZ`	2025093T011522.66Z		✔️
`%Y%OT%h%m%,3sZ`	2025093T011522,666Z		✔️
`%Y%OT%h%m%.3sZ`	2025093T011522.666Z		✔️
`%Y%OT%h%m%s,%uZ`	2025093T011522,666140Z		✔️
`%Y%OT%h%m%s.%uZ`	2025093T011522.666140Z		✔️
`%Y%OT%h%m%s.%nZ`	2025093T011522.666140394Z		✔️
`%Y%OT%h%m%s,%nZ`	2025093T011522,666140394Z		✔️
`%Y%OT%h%Z`	2025093T01+00		✔️
`%Y%OT%,1h%Z`	2025093T01,2+00		✔️
`%Y%OT%.1h%Z`	2025093T01.2+00		✔️
`%Y%OT%h%m%Z`	2025093T0115+00		✔️
`%Y%OT%h%,1m%Z`	2025093T0115,3+00		✔️
`%Y%OT%h%.1m%Z`	2025093T0115.3+00		✔️
`%Y%OT%h%m%s%Z`	2025093T011522+00		✔️
`%Y%OT%h%m%.1s%Z`	2025093T011522.6+00		✔️
`%Y%OT%h%m%.2s%Z`	2025093T011522.66+00		✔️
`%Y%OT%h%m%,3s%Z`	2025093T011522,666+00		✔️
`%Y%OT%h%m%.3s%Z`	2025093T011522.666+00		✔️
`%Y%OT%h%m%s,%u%Z`	2025093T011522,666140+00		✔️
`%Y%OT%h%m%s.%u%Z`	2025093T011522.666140+00		✔️
`%Y%OT%h%m%s.%n%Z`	2025093T011522.666140394+00		✔️
`%Y%OT%h%m%s,%n%Z`	2025093T011522,666140394+00		✔️
`%Y%OT%h%Z%z`	2025093T01+0000		✔️
`%Y%OT%,1h%Z%z`	2025093T01,2+0000		✔️
`%Y%OT%.1h%Z%z`	2025093T01.2+0000		✔️
`%Y%OT%h%m%Z%z`	2025093T0115+0000		✔️
`%Y%OT%h%,1m%Z%z`	2025093T0115,3+0000		✔️
`%Y%OT%h%.1m%Z%z`	2025093T0115.3+0000		✔️
`%Y%OT%h%m%s%Z%z`	2025093T011522+0000		✔️
`%Y%OT%h%m%.1s%Z%z`	2025093T011522.6+0000		✔️
`%Y%OT%h%m%.2s%Z%z`	2025093T011522.66+0000		✔️
`%Y%OT%h%m%,3s%Z%z`	2025093T011522,666+0000		✔️
`%Y%OT%h%m%.3s%Z%z`	2025093T011522.666+0000		✔️
`%Y%OT%h%m%s,%u%Z%z`	2025093T011522,666140+0000		✔️
`%Y%OT%h%m%s.%u%Z%z`	2025093T011522.666140+0000		✔️
`%Y%OT%h%m%s.%n%Z%z`	2025093T011522.666140394+0000		✔️
`%Y%OT%h%m%s,%n%Z%z`	2025093T011522,666140394+0000		✔️
`%Y-%M-%DT%h:%m:%s+08`	2025-04-03T09:15:22+08		✔️
`%Y-%M-%DT%h-12`	2025-04-02T13-12		✔️
`%Y-%M-%DT%h-12:00`	2025-04-02T13-12:00		✔️
`%Y-%M-%DT%h:%m-12`	2025-04-02T13:15-12		✔️
`%Y-%M-%DT%h:%m-12:00`	2025-04-02T13:15-12:00		✔️
Periods
`P1Y`	P1Y		✔️
`P1,5Y`	P1,5Y		✔️
`P1.5Y`	P1.5Y		✔️
`P1M`	P1M		✔️
`P1W`	P1W		✔️
`P1D`	P1D		✔️
`PT1H`	PT1H		✔️
`P1H`	P1H		✔️
`PT1M`	PT1M		✔️
`PT1S`	PT1S		✔️
`P1S`	P1S		✔️
`PT1,5S`	PT1,5S		✔️
`PT1.5S`	PT1.5S		✔️
`P1Y1M`	P1Y1M		✔️
`P1Y1D`	P1Y1D		✔️
`P1Y1M1D`	P1Y1M1D		✔️
`P1Y1M1DT1H1M1S`	P1Y1M1DT1H1M1S		✔️
`P1DT1H`	P1DT1H		✔️
`P1MT1M`	P1MT1M		✔️
`P1DT1M`	P1DT1M		✔️
`P1.5W`	P1.5W		✔️
`P1,5W`	P1,5W		✔️
`P1DT1.000S`	P1DT1.000S		✔️
`P1DT1.00000S`	P1DT1.00000S		✔️
`P1DT1H1M1.1S`	P1DT1H1M1.1S		✔️
`P1H1M1.1S`	P1H1M1.1S		✔️
Ranges
`%Y-%M-%D/P1Y`	2025-04-03/P1Y		✔️
`%Y-%M-%D/P1M`	2025-04-03/P1M		✔️
`%Y-%M-%D/P1D`	2025-04-03/P1D		✔️
`%V-W%W-%w/P1Y`	2025-W14-4/P1Y		✔️
`%V-W%W-%w/P1M`	2025-W14-4/P1M		✔️
`%V-W%W-%w/P1D`	2025-W14-4/P1D		✔️
`%Y-%O/P1Y`	2025-093/P1Y		✔️
`%Y-%O/P1M`	2025-093/P1M		✔️
`%Y-%O/P1D`	2025-093/P1D		✔️
`%Y-%M-%D/%Y-%M-%D`	2025-04-03/2025-04-03		✔️
`%Y-%M-%D/%V-W%W-%w`	2025-04-03/2025-W14-4		✔️
`%Y-%M-%D/%Y-%O`	2025-04-03/2025-093		✔️
`%V-W%W-%w/%Y-%M-%D`	2025-W14-4/2025-04-03		✔️
`%V-W%W-%w/%V-W%W-%w`	2025-W14-4/2025-W14-4		✔️
`%V-W%W-%w/%Y-%O`	2025-W14-4/2025-093		✔️
`%Y-%O/%Y-%M-%D`	2025-093/2025-04-03		✔️
`%Y-%O/%V-W%W-%w`	2025-093/2025-W14-4		✔️
`%Y-%O/%Y-%O`	2025-093/2025-093		✔️
`P1Y/%Y-%M-%D`	P1Y/2025-04-03		✔️
`P1Y/%V-W%W-%w`	P1Y/2025-W14-4		✔️
`P1Y/%Y-%O`	P1Y/2025-093		✔️
`P1M/%Y-%M-%D`	P1M/2025-04-03		✔️
`P1M/%V-W%W-%w`	P1M/2025-W14-4		✔️
`P1M/%Y-%O`	P1M/2025-093		✔️
`P1D/%Y-%M-%D`	P1D/2025-04-03		✔️
`P1D/%V-W%W-%w`	P1D/2025-W14-4		✔️
`P1D/%Y-%O`	P1D/2025-093		✔️
`%Y-%M-%DT%h/P1DT1H`	2025-04-03T01/P1DT1H		✔️
`%Y-%M-%DT%h:%m/P1DT1H`	2025-04-03T01:15/P1DT1H		✔️
`%Y-%M-%DT%h:%m:%s/P1DT1H`	2025-04-03T01:15:22/P1DT1H		✔️
`%Y-%M-%DT%h:%m:%.3s/P1DT1H`	2025-04-03T01:15:22.666/P1DT1H		✔️
`%Y-%M-%DT%h:%mZ/P1DT1H`	2025-04-03T01:15Z/P1DT1H		✔️
`%V-W%W-%wT%h/P1DT1H`	2025-W14-4T01/P1DT1H		✔️
`%V-W%W-%wT%h:%m/P1DT1H`	2025-W14-4T01:15/P1DT1H		✔️
`%V-W%W-%wT%h:%m:%s/P1DT1H`	2025-W14-4T01:15:22/P1DT1H		✔️
`%V-W%W-%wT%h:%m:%.3s/P1DT1H`	2025-W14-4T01:15:22.666/P1DT1H		✔️
`%V-W%W-%wT%h:%mZ/P1DT1H`	2025-W14-4T01:15Z/P1DT1H		✔️
`%Y-%OT%h/P1DT1H`	2025-093T01/P1DT1H		✔️
`%Y-%OT%h:%m/P1DT1H`	2025-093T01:15/P1DT1H		✔️
`%Y-%OT%h:%m:%s/P1DT1H`	2025-093T01:15:22/P1DT1H		✔️
`%Y-%OT%h:%m:%.3s/P1DT1H`	2025-093T01:15:22.666/P1DT1H		✔️
`%Y-%OT%h:%mZ/P1DT1H`	2025-093T01:15Z/P1DT1H		✔️
`P1DT1H/%Y-%M-%DT%h`	P1DT1H/2025-04-03T01		✔️
`P1DT1H/%Y-%M-%DT%h:%m`	P1DT1H/2025-04-03T01:15		✔️
`P1DT1H/%Y-%M-%DT%h:%m:%s`	P1DT1H/2025-04-03T01:15:22		✔️
`P1DT1H/%Y-%M-%DT%h:%m:%.3s`	P1DT1H/2025-04-03T01:15:22.666		✔️
`P1DT1H/%Y-%M-%DT%h:%mZ`	P1DT1H/2025-04-03T01:15Z		✔️
`P1DT1H/%V-W%W-%wT%h`	P1DT1H/2025-W14-4T01		✔️
`P1DT1H/%V-W%W-%wT%h:%m`	P1DT1H/2025-W14-4T01:15		✔️
`P1DT1H/%V-W%W-%wT%h:%m:%s`	P1DT1H/2025-W14-4T01:15:22		✔️
`P1DT1H/%V-W%W-%wT%h:%m:%.3s`	P1DT1H/2025-W14-4T01:15:22.666		✔️
`P1DT1H/%V-W%W-%wT%h:%mZ`	P1DT1H/2025-W14-4T01:15Z		✔️
`P1DT1H/%Y-%OT%h`	P1DT1H/2025-093T01		✔️
`P1DT1H/%Y-%OT%h:%m`	P1DT1H/2025-093T01:15		✔️
`P1DT1H/%Y-%OT%h:%m:%s`	P1DT1H/2025-093T01:15:22		✔️
`P1DT1H/%Y-%OT%h:%m:%.3s`	P1DT1H/2025-093T01:15:22.666		✔️
`P1DT1H/%Y-%OT%h:%mZ`	P1DT1H/2025-093T01:15Z		✔️
`R/%Y-%M-%D/P1Y`	R/2025-04-03/P1Y		✔️
`R/%V-W%W-%w/P1Y`	R/2025-W14-4/P1Y		✔️
`R/%Y-%O/P1Y`	R/2025-093/P1Y		✔️
`R/%Y-%M-%D/%Y-%M-%D`	R/2025-04-03/2025-04-03		✔️
`R/%Y-%M-%D/%V-W%W-%w`	R/2025-04-03/2025-W14-4		✔️
`R/%Y-%M-%D/%Y-%O`	R/2025-04-03/2025-093		✔️
`R/%V-W%W-%w/%Y-%M-%D`	R/2025-W14-4/2025-04-03		✔️
`R/%V-W%W-%w/%V-W%W-%w`	R/2025-W14-4/2025-W14-4		✔️
`R/%V-W%W-%w/%Y-%O`	R/2025-W14-4/2025-093		✔️
`R/%Y-%O/%Y-%M-%D`	R/2025-093/2025-04-03		✔️
`R/%Y-%O/%V-W%W-%w`	R/2025-093/2025-W14-4		✔️
`R/%Y-%O/%Y-%O`	R/2025-093/2025-093		✔️
`R10/%Y-%M-%D/P1Y`	R10/2025-04-03/P1Y		✔️
`R10/%V-W%W-%w/P1Y`	R10/2025-W14-4/P1Y		✔️
`R10/%Y-%O/P1Y`	R10/2025-093/P1Y		✔️
`R10/%Y-%M-%D/%Y-%M-%D`	R10/2025-04-03/2025-04-03		✔️
`R10/%Y-%M-%D/%V-W%W-%w`	R10/2025-04-03/2025-W14-4		✔️
`R10/%Y-%M-%D/%Y-%O`	R10/2025-04-03/2025-093		✔️
`R10/%V-W%W-%w/%Y-%M-%D`	R10/2025-W14-4/2025-04-03		✔️
`R10/%V-W%W-%w/%V-W%W-%w`	R10/2025-W14-4/2025-W14-4		✔️
`R10/%V-W%W-%w/%Y-%O`	R10/2025-W14-4/2025-093		✔️
`R10/%Y-%O/%Y-%M-%D`	R10/2025-093/2025-04-03		✔️
`R10/%Y-%O/%V-W%W-%w`	R10/2025-093/2025-W14-4		✔️
`R10/%Y-%O/%Y-%O`	R10/2025-093/2025-093		✔️

Format Key


%L - Millennium
%C - Century
%X - Decade
%Y - Year
%M - Month
%D - Day
%V - Week Year
%W - Week
%w - Week Day
%O - Ordinal Day

%h - Hour
%m - Minute
%s - Second
%u - Microsecond
%n - Nanosecond

%Z - Zone Hour including +/-
%z - Zone Minute

%[,.]3x - Value including fraction with given precision, using either comma or dot.
%−Z     - Use U+2212 for negative timezone hours

Test File Generator

RFC 3339ISO 8601

UnionIntersection

Format Checker

Type a format using the format key above to check a format's validity.
Note: doesn't check all possible formats, only checks formats in the table.

Format2025-04-03

RFC 3339: ✔️ Date
ISO 8601: ✔️ Date

ISO 8601 as a Service

Beta test a service to try parsing some ISO 8601 formats.
Only Date, Time, and DateTime are supported at the moment. There is no support for Period or Range.

Input String

Time Zone Switcher

Select a timezone to adjust zone for local dates and times.

Source on GitHub