Made the faces I care about not need to continuously re-find the timezone

movement/watch_faces/complication/moon_phase_face.c

@@ -139,6 +139,7 @@ bool moon_phase_face_loop(movement_event_t event, movement_settings_t *settings,
 
     switch (event.event_type) {
         case EVENT_ACTIVATE:
+        
             _update(settings, state, state->offset);
             break;
         case EVENT_TICK:

movement/watch_faces/complication/sunrise_sunset_face.c

@@ -54,8 +54,7 @@ static void _sunrise_sunset_face_update(movement_settings_t *settings, sunrise_s
     }
 
     watch_date_time date_time = watch_rtc_get_date_time(); // the current local date / time
-    int16_t tz = get_timezone_offset(settings->bit.time_zone, date_time);
-    watch_date_time utc_now = watch_utility_date_time_convert_zone(date_time, tz * 60, 0); // the current date / time in UTC
+    watch_date_time utc_now = watch_utility_date_time_convert_zone(date_time, state->tz * 60, 0); // the current date / time in UTC
     watch_date_time scratch_time; // scratchpad, contains different values at different times
     scratch_time.reg = utc_now.reg;
 
@@ -70,7 +69,7 @@ static void _sunrise_sunset_face_update(movement_settings_t *settings, sunrise_s
     // sunriset returns the rise/set times as signed decimal hours in UTC.
     // this can mean hours below 0 or above 31, which won't fit into a watch_date_time struct.
     // to deal with this, we set aside the offset in hours, and add it back before converting it to a watch_date_time.
-    double hours_from_utc = ((double)tz) / 60.0;
+    double hours_from_utc = ((double)state->tz) / 60.0;
 
     // we loop twice because if it's after sunset today, we need to recalculate to display values for tomorrow.
     for(int i = 0; i < 2; i++) {
@@ -317,6 +316,7 @@ void sunrise_sunset_face_activate(movement_settings_t *settings, void *context)
     movement_location_t movement_location = (movement_location_t) watch_get_backup_data(1);
     state->working_latitude = _sunrise_sunset_face_struct_from_latlon(movement_location.bit.latitude);
     state->working_longitude = _sunrise_sunset_face_struct_from_latlon(movement_location.bit.longitude);
+    state->tz = get_timezone_offset(settings->bit.time_zone, watch_rtc_get_date_time());
 }
 
 bool sunrise_sunset_face_loop(movement_event_t event, movement_settings_t *settings, void *context) {

movement/watch_faces/complication/sunrise_sunset_face.h

@@ -52,6 +52,7 @@ typedef struct {
     uint8_t rise_index;
     uint8_t active_digit;
     bool location_changed;
+    int16_t tz;
     watch_date_time rise_set_expires;
     sunrise_sunset_lat_lon_settings_t working_latitude;
     sunrise_sunset_lat_lon_settings_t working_longitude;