July 21, 2026 · Ansan-si, South Korea
Sunset in Ansan-si today is at 19:51. Day length is 14h 22m. See below for sunrise, solar noon, dawn and dusk — all times calculated astronomically for Ansan-si's coordinates and updated daily.
Ansan-si lies at 37°N. At this latitude, day length varies moderately — from around 10 hours in midwinter to 14–15 hours in midsummer.
Sunset shifts later through spring and earlier through autumn — changing fastest near the equinoxes and slowest near the summer and winter solstices. See the year chart to visualise how sunset times shift month by month for Ansan-si.
The longest day in Ansan-si is around 14h 44m (around June 21). The shortest is around 9h 35m (around December 21). Days are currently getting shorter — losing about 1 minute per day.
| Month | Sunset | Sunrise | Day length |
|---|---|---|---|
| January | 17:38 | 07:47 | 9h 52m |
| February | 18:12 | 07:24 | 10h 49m |
| March | 18:40 | 06:46 | 11h 54m |
| April | 19:07 | 06:00 | 13h 8m |
| May | 19:35 | 05:25 | 14h 9m |
| June | 19:55 | 05:12 | 14h 43m |
| July | 19:54 | 05:24 | 14h 30m |
| August | 19:27 | 05:49 | 13h 38m |
| September | 18:43 | 06:15 | 12h 28m |
| October | 17:58 | 06:41 | 11h 17m |
| November | 17:24 | 07:12 | 10h 12m |
| December | 17:17 | 07:40 | 9h 37m |