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adhere to RFC5545 regarding UNTIL timezones

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If the "DTSTART" property is specified as a date with UTC time or a date with
local time and time zone reference, then the UNTIL rule part MUST be specified
as a date with UTC time.
This commit is contained in:
Ryan Petrello
2018-01-29 12:25:30 -05:00
parent f8d9d5f51a
commit 6753f1ca35
3 changed files with 51 additions and 71 deletions
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18
docs/schedules.md
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@@ -50,7 +50,10 @@ A list of _valid_ zone identifiers (which can vary by system) can be found at:
UNTIL and Timezones
===================
RFC5545 specifies that:
`DTSTART` values provided to awx _must_ provide timezone information (they may
not be naive dates).
Additionally, RFC5545 specifies that:
> Furthermore, if the "DTSTART" property is specified as a date with local
> time, then the UNTIL rule part MUST also be specified as a date with local
@@ -58,20 +61,17 @@ RFC5545 specifies that:
> a date with local time and time zone reference, then the UNTIL rule part
> MUST be specified as a date with UTC time.
Given this, this RRULE:
Given this, `RRULE` values that specify `UNTIL` datetimes must *always* be in UTC.
Valid:
`DTSTART:20180601T120000Z RRULE:FREQ=DAILY;INTERVAL=1;UNTIL=20180606T170000Z`
`DTSTART;TZID=America/New_York:20180601T120000 RRULE:FREQ=DAILY;INTERVAL=1;UNTIL=20180606T170000Z`
...will be interpretted as "Starting on June 1st, 2018 at noon UTC, repeat
daily, ending on June 6th, 2018 at 5PM UTC".
This RRULE:
Not Valid:
`DTSTART:20180601T120000Z RRULE:FREQ=DAILY;INTERVAL=1;UNTIL=20180606T170000`
`DTSTART;TZID=America/New_York:20180601T120000 RRULE:FREQ=DAILY;INTERVAL=1;UNTIL=20180606T170000`
...will be interpretted as "Starting on June 1st, 2018 at noon EDT, repeat
daily, ending on June 6th, 2018 at 5PM EDT".
Previewing Schedules
====================