Longest and shortest day in Incheon
In Incheon, South Korea, the longest day of 2026 is around the June solstice on Sunday, 21 June 2026, with 14h 45m of daylight, and the shortest is around the December solstice on Monday, 21 December 2026, with 9h 35m.
| Turning point | Date | Sunrise | Sunset | Day length |
|---|---|---|---|---|
| March equinox | Friday, 20 March 2026 | 06:37 | 18:44 | 12h 7m |
| June solstice | Sunday, 21 June 2026 | 05:12 | 19:57 | 14h 45m |
| September equinox | Tuesday, 22 September 2026 | 06:20 | 18:30 | 12h 10m |
| December solstice | Monday, 21 December 2026 | 07:43 | 17:18 | 9h 35m |
| Month | Sunrise | Sunset | Day length |
|---|---|---|---|
| January | 07:46 | 17:38 | 9h 51m |
| February | 07:23 | 18:11 | 10h 49m |
| March | 06:45 | 18:39 | 11h 54m |
| April | 05:59 | 19:07 | 13h 8m |
| May | 05:24 | 19:34 | 14h 10m |
| June | 05:11 | 19:55 | 14h 44m |
| July | 05:23 | 19:54 | 14h 30m |
| August | 05:48 | 19:26 | 13h 37m |
| September | 06:14 | 18:41 | 12h 27m |
| October | 06:40 | 17:56 | 11h 16m |
| November | 07:12 | 17:22 | 10h 11m |
| December | 07:40 | 17:16 | 9h 36m |
Why the day gets longer and shorter in Incheon
Earth's axis is tilted about 23.4 degrees, so as the planet orbits the Sun, Incheon 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 Incheon sits from the equator: the further away, the bigger the difference between the longest and shortest day.
Frequently asked questions about day length in Incheon
When is the longest day in Incheon?
The longest day in Incheon falls around the June solstice, on Sunday, 21 June 2026 in 2026, with about 14h 45m of daylight, sunrise at 05:12 and sunset at 19:57.
When is the shortest day in Incheon?
The shortest day in Incheon falls around the December solstice, on Monday, 21 December 2026 in 2026, with about 9h 35m of daylight, sunrise at 07:43 and sunset at 17:18.
How much does day length change through the year in Incheon?
Between the longest and shortest day, Incheon gains and loses about 5h 10m of daylight. The change is fastest around the March and September equinoxes and slowest near the solstices.
Every figure is computed from Incheon's coordinates with SunCalc, not looked up from a table.