Longest and shortest day in Datong
In Datong, China, the longest day of 2026 is around the June solstice on Sunday, 21 June 2026, with 15h 2m of daylight, and the shortest is around the December solstice on Monday, 21 December 2026, with 9h 19m.
| Turning point | Date | Sunrise | Sunset | Day length |
|---|---|---|---|---|
| March equinox | Friday, 20 March 2026 | 06:31 | 18:38 | 12h 7m |
| June solstice | Sunday, 21 June 2026 | 04:57 | 19:59 | 15h 2m |
| September equinox | Tuesday, 22 September 2026 | 06:13 | 18:24 | 12h 11m |
| December solstice | Monday, 21 December 2026 | 07:45 | 17:04 | 9h 19m |
| Month | Sunrise | Sunset | Day length |
|---|---|---|---|
| January | 07:47 | 17:25 | 9h 38m |
| February | 07:20 | 18:01 | 10h 41m |
| March | 06:39 | 18:32 | 11h 54m |
| April | 05:49 | 19:04 | 13h 15m |
| May | 05:12 | 19:34 | 14h 23m |
| June | 04:57 | 19:57 | 15h 0m |
| July | 05:10 | 19:55 | 14h 45m |
| August | 05:37 | 19:24 | 13h 46m |
| September | 06:07 | 18:36 | 12h 29m |
| October | 06:36 | 17:47 | 11h 11m |
| November | 07:11 | 17:10 | 9h 59m |
| December | 07:41 | 17:02 | 9h 21m |
Why the day gets longer and shorter in Datong
Earth's axis is tilted about 23.4 degrees, so as the planet orbits the Sun, Datong 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 Datong sits from the equator: the further away, the bigger the difference between the longest and shortest day.
Frequently asked questions about day length in Datong
When is the longest day in Datong?
The longest day in Datong falls around the June solstice, on Sunday, 21 June 2026 in 2026, with about 15h 2m of daylight, sunrise at 04:57 and sunset at 19:59.
When is the shortest day in Datong?
The shortest day in Datong falls around the December solstice, on Monday, 21 December 2026 in 2026, with about 9h 19m of daylight, sunrise at 07:45 and sunset at 17:04.
How much does day length change through the year in Datong?
Between the longest and shortest day, Datong gains and loses about 5h 43m of daylight. The change is fastest around the March and September equinoxes and slowest near the solstices.
Every figure is computed from Datong's coordinates with SunCalc, not looked up from a table.