Singapore’s planetary hours stay within a minute of sixty all year, and the first one starts near seven
At 1.35° north of the equator, day and night in Singapore are almost equal all year. Through the year a day hour runs between 60.2 and 61.0 minutes and a night hour between 59.0 and 59.8. The day hours run a little long everywhere, because sunrise is counted when the upper edge of the Sun appears and the atmosphere lifts its image slightly above the horizon.
The clock is the bigger story. Singapore keeps UTC+8 although its longitude of 103.8° east would put it nearer UTC+7, so the Sun runs about an hour behind the clock. Solar noon falls between 12:48 and 13:19, and sunrise never comes before 06:46 (22 October) or after 07:16 (30 January). The first planetary hour therefore starts close to seven every morning, and the seventh hour, which begins at solar noon, starts close to 13:00.
Singapore moved from UTC+7:30 to UTC+8 on 1 January 1982. For a birth in Singapore before then, the calculator applies the older offset from the time zone records.
| Date | Sunrise | Sunset | Day hour | Night hour |
|---|---|---|---|---|
| 20 March | 07:09 | 19:15 | 61 min | 59 min |
| 21 June | 07:00 | 19:12 | 61 min | 59 min |
| 23 September | 06:54 | 19:00 | 61 min | 59 min |
| 21 December | 07:00 | 19:03 | 60 min | 60 min |
Times are local clock times from this calculator, with daylight saving applied where Singapore uses it. Each planetary hour is one twelfth of the daylight or one twelfth of the night, so these two lengths set every hour of the day.
Born in Singapore? Enter your birth date and time to see your hour
Leave the city on Singapore, set your birth date and type your birth time into the time field. The panel names your hour and the dial turns to the planetary day you were born in. Singapore used UTC+7:30 until the end of 1981, and the calculator applies that offset automatically for earlier birth dates. A birth before sunrise belongs to the night of the previous day, and the panel tells you when that applies.