DST of Tongatapu in 2025
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
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At Sun Jan 19 03:00:00 2025, clocks in Tongatapu are turned backward 1 hour to Sun Jan 19 02:00:00 2025 to end DST
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At Sun Nov 2 02:00:00 2025, clocks in Tongatapu are turned forward 1 hour to Sun Nov 2 03:00:00 2025 to start DST
DST of Tongatapu Over Years
| Year | Commences | Abbreviations | Time Change | Offset After |
| 2010 - 2015 | No changes, UTC+1300 all of the period | |||
| 2016 | 11-06, Sun 03:00 |
+13 -> +14 | 1 hour forward (start of DST) | UTC+1400 |
| 2017 | 01-15, Sun 02:00 |
+14 -> +13 | 1 hour backward (end of DST) | UTC+1300 |
| 11-05, Sun 03:00 |
+13 -> +14 | 1 hour forward (start of DST) | UTC+1400 | |
| 2018 | 01-21, Sun 02:00 |
+14 -> +13 | 1 hour backward (end of DST) | UTC+1300 |
| 11-04, Sun 03:00 |
+13 -> +14 | 1 hour forward (start of DST) | UTC+1400 | |
| 2019 | 01-20, Sun 02:00 |
+14 -> +13 | 1 hour backward (end of DST) | UTC+1300 |
| 11-03, Sun 03:00 |
+13 -> +14 | 1 hour forward (start of DST) | UTC+1400 | |
