DST started on Sunday, March 31, 1991, 2:00:00 am. However, clocks were not changed because Dushanbe switched time zones at the same time.
Back 1 hour
When local daylight time was about to reach
Monday, September 9, 1991, 3:00:00 am clocks were turned backward 1 hour to
Monday, September 9, 1991, 2:00:00 am local standard time instead.
Sunrise and sunset were about 1 hour earlier on Sep 9, 1991 than the day before. There was more light in the morning.