timeZone property
Used to specify the time zone of TimeRegion start and end time.
See also:
- endTime, the date time value in which the time region will end.
- startTime, the date time value in which the time region will start.
- SfCalendar.timeZone, to set the timezone for the calendar.
- The documentation for time zone
 Widget build(BuildContext context) {
   return Container(
     child: SfCalendar(
       view: CalendarView.week,
       specialRegions: _getTimeRegions(),
     ),
   );
 }
 List<TimeRegion> _getTimeRegions() {
   final List<TimeRegion> regions = <TimeRegion>[];
   regions.add(TimeRegion(
       startTime: DateTime.now(),
       endTime: DateTime.now().add(Duration(hours: 1)),
       enablePointerInteraction: false,
       timeZone: 'Eastern Standard Time',
       color: Colors.grey.withOpacity(0.2),
       text: 'Break'));
   return regions;
 }
Implementation
final String? timeZone;