6e5d417967
This fixes scenario described [here](https://github.com/grafana/oncall/issues/2118#issuecomment-1580499754). When a rotation is setup in UTC+1, and the shift starts at 00:00 with Monday as active day and a weekly frequency, the values are translated to UTC when submitting to the backend, so the shift data becomes something like: shift starting at 23:00 on Sunday, but since week_start is on Monday, the "first event" in the week belongs to the "previous week". This can be addressed by moving the week_start, so a weekly shift that was starting on a Monday but in UTC tz starts on Sunday, "translates" to a UTC week_start on Sunday:  (this is with the proposed changes; otherwise you get the same issue linked above where the first event in the week is assigned to the other user group). About selected week days changed when editing a rotation, see inline comment (related to [this](https://github.com/grafana/oncall/issues/1322#issuecomment-1521787786)) |
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| .. | ||
| serializers | ||
| tests | ||
| throttlers | ||
| views | ||
| __init__.py | ||
| errors.py | ||
| permissions.py | ||
| response_renderers.py | ||
| urls.py | ||