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 |
| 2010 | 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 | |
| 2011 | 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 | |
| 2012 | 03-21, Wed 01:00 |
IRST -> IRDT | 1 hour forward (start of DST) | UTC+0430 |
| 09-20, Thu 23:00 |
IRDT -> IRST | 1 hour backward (end of DST) | UTC+0330 | |
| 2013 | 03-22, 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 | |
| 2014 | 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 | |
| 2015 | 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 | |
| 2016 | 03-21, Mon 01:00 |
IRST -> IRDT | 1 hour forward (start of DST) | UTC+0430 |
| 09-20, Tue 23:00 |
IRDT -> IRST | 1 hour backward (end of DST) | UTC+0330 | |
| 2017 | 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 | |
| 2018 | 03-22, Thu 01:00 |
IRST -> IRDT | 1 hour forward (start of DST) | UTC+0430 |
| 09-21, Fri 23:00 |
IRDT -> IRST | 1 hour backward (end of DST) | UTC+0330 | |
| 2019 | 03-22, 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 |
