Longest and shortest day in Changshu
In Changshu, China, the longest day of 2026 is around the June solstice on Sunday, 21 June 2026, with 14h 13m of daylight, and the shortest is around the December solstice on Monday, 21 December 2026, with 10h 5m.
| Turning point | Date | Sunrise | Sunset | Day length |
|---|---|---|---|---|
| March equinox | Friday, 20 March 2026 | 06:01 | 18:08 | 12h 7m |
| June solstice | Sunday, 21 June 2026 | 04:52 | 19:05 | 14h 13m |
| September equinox | Tuesday, 22 September 2026 | 05:44 | 17:54 | 12h 9m |
| December solstice | Monday, 21 December 2026 | 06:52 | 16:57 | 10h 5m |
| Month | Sunrise | Sunset | Day length |
|---|---|---|---|
| January | 06:57 | 17:15 | 10h 18m |
| February | 06:39 | 17:43 | 11h 4m |
| March | 06:08 | 18:04 | 11h 57m |
| April | 05:29 | 18:25 | 12h 56m |
| May | 05:00 | 18:46 | 13h 45m |
| June | 04:51 | 19:03 | 14h 12m |
| July | 05:02 | 19:03 | 14h 1m |
| August | 05:21 | 18:40 | 13h 19m |
| September | 05:40 | 18:03 | 12h 23m |
| October | 05:59 | 17:25 | 11h 26m |
| November | 06:24 | 16:58 | 10h 33m |
| December | 06:48 | 16:55 | 10h 6m |
Why the day gets longer and shorter in Changshu
Earth's axis is tilted about 23.4 degrees, so as the planet orbits the Sun, Changshu 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 Changshu sits from the equator: the further away, the bigger the difference between the longest and shortest day.
Frequently asked questions about day length in Changshu
When is the longest day in Changshu?
The longest day in Changshu falls around the June solstice, on Sunday, 21 June 2026 in 2026, with about 14h 13m of daylight, sunrise at 04:52 and sunset at 19:05.
When is the shortest day in Changshu?
The shortest day in Changshu falls around the December solstice, on Monday, 21 December 2026 in 2026, with about 10h 5m of daylight, sunrise at 06:52 and sunset at 16:57.
How much does day length change through the year in Changshu?
Between the longest and shortest day, Changshu gains and loses about 4h 8m of daylight. The change is fastest around the March and September equinoxes and slowest near the solstices.
Every figure is computed from Changshu's coordinates with SunCalc, not looked up from a table.