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| 01:17:05
| <rkirsling> | so I'm just gonna ask this here for good measure before creating an issue, but Yusuke pointed out that the spec is perhaps more conservative than necessary in saying which ISO 8601 time zone designators are allowed in a date time string |
| 01:17:10
| <rkirsling> | namely |
| 01:17:32
| <rkirsling> | (as of the latest JSC revision) |
| 01:18:05
| <gibson042> | in what way? |
| 01:18:15
| <rkirsling> | JSC / V8 / SM / XS / Ch are _all_ able to handle Date.parse('1970-01-01T00:00:00.000+2300') |
| 01:18:19
| <rkirsling> | i.e. without the colon |
| 01:18:39
| <rkirsling> | and JSC / XS / Ch are even able to handle Date.parse('1970-01-01T00:00:00.000+23') |
| 01:18:48
| <rkirsling> | i.e. just hh without mm |
| 01:19:36
| <gibson042> | those are implementation-dependent extension that I do not believe should be mandated by spec |
| 01:20:33
| <rkirsling> | the latter example seems trickier since we'd be requiring something that V8 and SM (and even JSC before today) haven't been doing but |
| 01:21:05
| <rkirsling> | if all implementations are allowing the dropped colon, I think Yusuke has a point that it would be reasonable to specify it, since it is a part of ISO 8601? |
| 01:21:50
| <gibson042> | it is only a part of ISO 8601 _basic format_, which drops all punctuation other than the + or - preceding UTC offset |
| 01:21:56
| <rkirsling> | gibson042: yeah, I do understand that anything beyond what's specified is an implementation-dependent extension but |
| 01:22:05
| <rkirsling> | hmm |
| 01:22:12
| <gibson042> | but as noted in RFC 3339, "ISO 8601 is not clear if mixtures of basic and extended format are permissible" |
| 01:22:30
| <rkirsling> | ohh that's very interesting |
| 01:22:54
| <gibson042> | YYYYMMDDThhmmss±hhmm is explicitly allowed (basic format), and YYYY-MM-DDThh:mm:ss±hh:mm is explicitly allowed (extended format) |
| 01:23:00
| <gibson042> | but mixtures are not mentioned |
| 01:23:23
| <rkirsling> | I see |
| 01:24:02
| <gibson042> | and the ECMAScript format is based on (and only requires support for) a subset of extended format |
| 01:24:34
| <rkirsling> | (looking at that RFC, it's also interesting that their `ISO 8601 is not clear on whether an hour of 24 is permissible only if minutes and seconds are 0. This assumes that an hour of 24 is permissible in any context.` is what JSC / XS / Ch do but not V8 / SM) |
| 01:25:40
| <rkirsling> | gibson042: would you vote then that it's better to stick to just specifying ISO 8601 extended format versus "what's intersectionally allowed by all major implementations"? |
| 01:26:08
| <gibson042> | yeah, that's a problem in its own right because ISO 8601 only intended hh=24 for the end of a calendar day *within a time interval*, not for isolated date and time of day values |
| 01:26:24
| <gibson042> | yes |
| 01:26:44
| <rkirsling> | yeah. I don't think I want to touch the hh=24 thing either 😓 |
| 01:26:56
| <rkirsling> | okay, I can convey that back then |
| 01:27:17
| <gibson042> | others may disagree, of course |
| 01:27:19
| <rkirsling> | context was https://bugs.webkit.org/show_bug.cgi?id=160287 if you're curious |
| 01:30:38
| <gibson042> | "The end of day representation, where [hh] has a value of [24], shall not be used for a single time point." /whoops |
| 01:31:25
| <gibson042> | but yeah, certainly not intended for use with nonzero minutes/seconds/subseconds |
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| 01:33:06
| <rkirsling> | right |
| 01:33:13
| <rkirsling> | pretty awkward 😓 |
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