Longest and shortest day in Ulsan
In Ulsan, South Korea, the longest day of 2026 is around the June solstice on Sunday, 21 June 2026, with 14h 34m of daylight, and the shortest is around the December solstice on Monday, 21 December 2026, with 9h 45m.
| Turning point | Date | Sunrise | Sunset | Day length |
|---|---|---|---|---|
| March equinox | Friday, 20 March 2026 | 06:27 | 18:34 | 12h 7m |
| June solstice | Sunday, 21 June 2026 | 05:07 | 19:41 | 14h 34m |
| September equinox | Tuesday, 22 September 2026 | 06:10 | 18:20 | 12h 10m |
| December solstice | Monday, 21 December 2026 | 07:27 | 17:13 | 9h 45m |
| Month | Sunrise | Sunset | Day length |
|---|---|---|---|
| January | 07:31 | 17:32 | 10h 1m |
| February | 07:10 | 18:04 | 10h 54m |
| March | 06:34 | 18:29 | 11h 55m |
| April | 05:51 | 18:55 | 13h 4m |
| May | 05:18 | 19:20 | 14h 2m |
| June | 05:06 | 19:39 | 14h 33m |
| July | 05:18 | 19:38 | 14h 20m |
| August | 05:41 | 19:12 | 13h 31m |
| September | 06:05 | 18:30 | 12h 25m |
| October | 06:28 | 17:47 | 11h 19m |
| November | 06:57 | 17:16 | 10h 19m |
| December | 07:24 | 17:10 | 9h 46m |
Why the day gets longer and shorter in Ulsan
Earth's axis is tilted about 23.4 degrees, so as the planet orbits the Sun, Ulsan 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 Ulsan sits from the equator: the further away, the bigger the difference between the longest and shortest day.
Frequently asked questions about day length in Ulsan
When is the longest day in Ulsan?
The longest day in Ulsan falls around the June solstice, on Sunday, 21 June 2026 in 2026, with about 14h 34m of daylight, sunrise at 05:07 and sunset at 19:41.
When is the shortest day in Ulsan?
The shortest day in Ulsan falls around the December solstice, on Monday, 21 December 2026 in 2026, with about 9h 45m of daylight, sunrise at 07:27 and sunset at 17:13.
How much does day length change through the year in Ulsan?
Between the longest and shortest day, Ulsan gains and loses about 4h 49m of daylight. The change is fastest around the March and September equinoxes and slowest near the solstices.
Every figure is computed from Ulsan's coordinates with SunCalc, not looked up from a table.