Requested by dreirund: with no GPS fix, no Wi-Fi and no companion app there was
no way to set the clock at all. That is not cosmetic, because message timestamps
are built from it, so a device used purely offline could not hold a correct one.
Settings, Clock now takes local time as "YYYY-MM-DD HH:MM". mktime() reads it
through the configured zone, the same zone the clock is displayed in, so what you
type is what you see rather than something you convert to UTC yourself, and
tm_isdst is left at -1 so summer time is not an hour out. The field is prefilled
with the current reading, which makes a correction an edit of a digit or two
rather than typing a full stamp on a device keyboard.
Rejected values are refused the same way every other clock source is: below the
send-timestamp floor is not accepted, so a mistyped year cannot walk the ratchet
backwards.
All nine S3 envs and both ESP32-P4 targets green.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
