Longest and shortest day in Batam
In Batam, Indonesia, the longest day of 2026 is around the June solstice on Sunday, 21 June 2026, with 12h 11m of daylight, and the shortest is around the December solstice on Monday, 21 December 2026, with 12h 4m.
| Turning point | Date | Sunrise | Sunset | Day length |
|---|---|---|---|---|
| March equinox | Friday, 20 March 2026 | 06:08 | 18:14 | 12h 6m |
| June solstice | Sunday, 21 June 2026 | 05:59 | 18:11 | 12h 11m |
| September equinox | Tuesday, 22 September 2026 | 05:53 | 17:59 | 12h 7m |
| December solstice | Monday, 21 December 2026 | 06:00 | 18:03 | 12h 4m |
| Month | Sunrise | Sunset | Day length |
|---|---|---|---|
| January | 06:11 | 18:15 | 12h 4m |
| February | 06:15 | 18:20 | 12h 5m |
| March | 06:09 | 18:16 | 12h 6m |
| April | 05:59 | 18:08 | 12h 8m |
| May | 05:55 | 18:05 | 12h 10m |
| June | 05:58 | 18:09 | 12h 11m |
| July | 06:04 | 18:15 | 12h 11m |
| August | 06:03 | 18:12 | 12h 9m |
| September | 05:55 | 18:02 | 12h 7m |
| October | 05:47 | 17:52 | 12h 5m |
| November | 05:46 | 17:50 | 12h 4m |
| December | 05:57 | 18:00 | 12h 4m |
Why the day gets longer and shorter in Batam
Earth's axis is tilted about 23.4 degrees, so as the planet orbits the Sun, Batam leans toward the Sun for part of the year and away for the rest. When it leans toward the Sun the days lengthen and the Sun climbs higher; half a year later the opposite happens. The size of the swing depends on how far Batam sits from the equator: the further away, the bigger the difference between the longest and shortest day.
Frequently asked questions about day length in Batam
When is the longest day in Batam?
The longest day in Batam falls around the June solstice, on Sunday, 21 June 2026 in 2026, with about 12h 11m of daylight, sunrise at 05:59 and sunset at 18:11.
When is the shortest day in Batam?
The shortest day in Batam falls around the December solstice, on Monday, 21 December 2026 in 2026, with about 12h 4m of daylight, sunrise at 06:00 and sunset at 18:03.
How much does day length change through the year in Batam?
Between the longest and shortest day, Batam gains and loses about 0h 7m of daylight. The change is fastest around the March and September equinoxes and slowest near the solstices.
Every figure is computed from Batam's coordinates with SunCalc, not looked up from a table.