October 2021, Time Change Calendar
October 2021 daylight saving time change
DST colors in the calendar
New Moon Full Moon
All countries with DST, forward or backward 1 hour:except Lord Howe Island to the east of Australia that forward and backwards 00:30'
Mexico makes 2 time changes: one in the period April-October (for most of the country) and another in March-November for the border cities with US, adapting its time zone with the United States.