Longest and shortest day in Lanzhou
In Lanzhou, China, the longest day of 2026 is around the June solstice on Sunday, 21 June 2026, with 14h 37m of daylight, and the shortest is around the December solstice on Monday, 21 December 2026, with 9h 42m.
| Turning point | Date | Sunrise | Sunset | Day length |
|---|---|---|---|---|
| March equinox | Friday, 20 March 2026 | 07:08 | 19:16 | 12h 7m |
| June solstice | Sunday, 21 June 2026 | 05:48 | 20:24 | 14h 37m |
| September equinox | Tuesday, 22 September 2026 | 06:52 | 19:02 | 12h 10m |
| December solstice | Monday, 21 December 2026 | 08:11 | 17:53 | 9h 42m |
| Month | Sunrise | Sunset | Day length |
|---|---|---|---|
| January | 08:14 | 18:13 | 9h 58m |
| February | 07:52 | 18:45 | 10h 53m |
| March | 07:16 | 19:11 | 11h 55m |
| April | 06:32 | 19:37 | 13h 5m |
| May | 05:59 | 20:03 | 14h 4m |
| June | 05:47 | 20:23 | 14h 36m |
| July | 05:59 | 20:21 | 14h 23m |
| August | 06:22 | 19:55 | 13h 32m |
| September | 06:46 | 19:12 | 12h 26m |
| October | 07:11 | 18:29 | 11h 18m |
| November | 07:40 | 17:57 | 10h 16m |
| December | 08:07 | 17:51 | 9h 44m |
Why the day gets longer and shorter in Lanzhou
Earth's axis is tilted about 23.4 degrees, so as the planet orbits the Sun, Lanzhou 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 Lanzhou sits from the equator: the further away, the bigger the difference between the longest and shortest day.
Frequently asked questions about day length in Lanzhou
When is the longest day in Lanzhou?
The longest day in Lanzhou falls around the June solstice, on Sunday, 21 June 2026 in 2026, with about 14h 37m of daylight, sunrise at 05:48 and sunset at 20:24.
When is the shortest day in Lanzhou?
The shortest day in Lanzhou falls around the December solstice, on Monday, 21 December 2026 in 2026, with about 9h 42m of daylight, sunrise at 08:11 and sunset at 17:53.
How much does day length change through the year in Lanzhou?
Between the longest and shortest day, Lanzhou gains and loses about 4h 55m of daylight. The change is fastest around the March and September equinoxes and slowest near the solstices.
Every figure is computed from Lanzhou's coordinates with SunCalc, not looked up from a table.