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fix: sunrise/set before DST change

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The Sunrise and Sunset timezone offset needs to be calculated for the day it's relevant to, since it might experience a timezone  change.
This commit is contained in:
Stephan
2026-03-30 00:52:55 +01:00
parent cb58dea276
commit 8bd07b407c
3 changed files with 23 additions and 5 deletions
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movement.c
+20
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@@ -660,6 +660,26 @@ int32_t movement_get_current_timezone_offset(void) {
return movement_get_current_timezone_offset_for_zone(movement_state.settings.bit.time_zone);
}
int32_t movement_get_timezone_offset_for_date_in_zone(watch_date_time_t date_time, uint8_t zone_index) {
int8_t cached_dst_offset = _movement_dst_offset_cache[zone_index];
if (cached_dst_offset == TIMEZONE_DOES_NOT_OBSERVE) {
return (int32_t)zone_defns[zone_index].offset_inc_minutes * OFFSET_INCREMENT * 60;
}
// Compute the offset for the given date using the zone's DST rules
uzone_t local_zone;
unpack_zone(&zone_defns[zone_index], "", &local_zone);
udatetime_t udt = _movement_convert_date_time_to_udate(date_time);
uoffset_t offset;
get_current_offset(&local_zone, &udt, &offset);
return (int32_t)(offset.hours * 60 + offset.minutes) * 60;
}
int32_t movement_get_timezone_offset_for_date(watch_date_time_t date_time) {
return movement_get_timezone_offset_for_date_in_zone(date_time, movement_state.settings.bit.time_zone);
}
int32_t movement_get_timezone_index(void) {
return movement_state.settings.bit.time_zone;
}