Longest and shortest day in Sanya
In Sanya, China, the longest day of 2026 is around the June solstice on Sunday, 21 June 2026, with 13h 14m of daylight, and the shortest is around the December solstice on Monday, 21 December 2026, with 11h 2m.
| Turning point | Date | Sunrise | Sunset | Day length |
|---|---|---|---|---|
| March equinox | Friday, 20 March 2026 | 06:46 | 18:52 | 12h 6m |
| June solstice | Sunday, 21 June 2026 | 06:06 | 19:20 | 13h 14m |
| September equinox | Tuesday, 22 September 2026 | 06:30 | 18:38 | 12h 8m |
| December solstice | Monday, 21 December 2026 | 07:08 | 18:10 | 11h 2m |
| Month | Sunrise | Sunset | Day length |
|---|---|---|---|
| January | 07:16 | 18:25 | 11h 9m |
| February | 07:09 | 18:42 | 11h 33m |
| March | 06:50 | 18:51 | 12h 1m |
| April | 06:25 | 18:58 | 12h 33m |
| May | 06:08 | 19:07 | 12h 59m |
| June | 06:05 | 19:18 | 13h 13m |
| July | 06:14 | 19:21 | 13h 7m |
| August | 06:23 | 19:08 | 12h 45m |
| September | 06:29 | 18:44 | 12h 15m |
| October | 06:35 | 18:19 | 11h 44m |
| November | 06:47 | 18:04 | 11h 17m |
| December | 07:05 | 18:08 | 11h 3m |
Why the day gets longer and shorter in Sanya
Earth's axis is tilted about 23.4 degrees, so as the planet orbits the Sun, Sanya 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 Sanya sits from the equator: the further away, the bigger the difference between the longest and shortest day.
Frequently asked questions about day length in Sanya
When is the longest day in Sanya?
The longest day in Sanya falls around the June solstice, on Sunday, 21 June 2026 in 2026, with about 13h 14m of daylight, sunrise at 06:06 and sunset at 19:20.
When is the shortest day in Sanya?
The shortest day in Sanya falls around the December solstice, on Monday, 21 December 2026 in 2026, with about 11h 2m of daylight, sunrise at 07:08 and sunset at 18:10.
How much does day length change through the year in Sanya?
Between the longest and shortest day, Sanya gains and loses about 2h 12m of daylight. The change is fastest around the March and September equinoxes and slowest near the solstices.
Every figure is computed from Sanya's coordinates with SunCalc, not looked up from a table.