DST of Tehran in 2025
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
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At Sat Mar 22 00:00:00 2025, clocks in Tehran are turned forward 1 hour to Sat Mar 22 01:00:00 2025 to start DST
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At Mon Sep 22 00:00:00 2025, clocks in Tehran are turned backward 1 hour to Sun Sep 21 23:00:00 2025 to end DST
DST of Tehran Over Years
| Year | Commences | Abbreviations | Time Change | Offset After |
| 1990 - 1990 | No changes, UTC+0330 all of the period | |||
| 1991 | 05-03, Fri 01:00 |
IRST -> IRDT | 1 hour forward (start of DST) | UTC+0430 |
| 09-21, Sat 23:00 |
IRDT -> IRST | 1 hour backward (end of DST) | UTC+0330 | |
| 1992 | 03-22, Sun 01:00 |
IRST -> IRDT | 1 hour forward (start of DST) | UTC+0430 |
| 09-21, Mon 23:00 |
IRDT -> IRST | 1 hour backward (end of DST) | UTC+0330 | |
| 1993 | 03-22, Mon 01:00 |
IRST -> IRDT | 1 hour forward (start of DST) | UTC+0430 |
| 09-21, Tue 23:00 |
IRDT -> IRST | 1 hour backward (end of DST) | UTC+0330 | |
| 1994 | 03-22, Tue 01:00 |
IRST -> IRDT | 1 hour forward (start of DST) | UTC+0430 |
| 09-21, Wed 23:00 |
IRDT -> IRST | 1 hour backward (end of DST) | UTC+0330 | |
| 1995 | 03-22, Wed 01:00 |
IRST -> IRDT | 1 hour forward (start of DST) | UTC+0430 |
| 09-21, Thu 23:00 |
IRDT -> IRST | 1 hour backward (end of DST) | UTC+0330 | |
| 1996 | 03-21, Thu 01:00 |
IRST -> IRDT | 1 hour forward (start of DST) | UTC+0430 |
| 09-20, Fri 23:00 |
IRDT -> IRST | 1 hour backward (end of DST) | UTC+0330 | |
| 1997 | 03-22, Sat 01:00 |
IRST -> IRDT | 1 hour forward (start of DST) | UTC+0430 |
| 09-21, Sun 23:00 |
IRDT -> IRST | 1 hour backward (end of DST) | UTC+0330 | |
| 1998 | 03-22, Sun 01:00 |
IRST -> IRDT | 1 hour forward (start of DST) | UTC+0430 |
| 09-21, Mon 23:00 |
IRDT -> IRST | 1 hour backward (end of DST) | UTC+0330 | |
| 1999 | 03-22, Mon 01:00 |
IRST -> IRDT | 1 hour forward (start of DST) | UTC+0430 |
| 09-21, Tue 23:00 |
IRDT -> IRST | 1 hour backward (end of DST) | UTC+0330 | |
