Seongnam-si
Sunrise and sunset in Seongnam-si
Today’s sunrise, sunset and twilight in Seongnam-si, in local time. At 37.4° N, the day lasts from 9 h 35 min at the winter solstice to 14 h 45 min at the summer solstice.
Today · worked out at
Thursday, October 22: sunrise at 06:45, sunset at 17:45.
Day length 11 h 00 min, 2 min 15 s shorter than yesterday.
Solar noon at 12:15, with the Sun 42° above the horizon.
Times are Seongnam-si time (GMT+9).
Twilight and golden hour today
| Today | Morning | Evening |
|---|---|---|
| Astronomical twilight | 05:18 | 19:12 |
| Nautical twilight | 05:48 | 18:42 |
| Civil twilight | 06:19 | 18:12 |
| Sunrise and sunset | 06:45 | 17:45 |
| Golden hour | 06:45–07:21 | 17:09–17:45 |
Each twilight begins at the morning time and ends at the evening one.
The year in Seongnam-si
- Longest day: June 21, 14 h 45 min, from sunrise at 05:10 to sunset at 19:55.
- Shortest day: December 22, 9 h 35 min, from sunrise at 07:42 to sunset at 17:17.
Sunrise and sunset on the 21st of each month, 2026
| Date | Sunrise | Sunset | Day length |
|---|---|---|---|
| January 21 | 07:42 | 17:43 | 10 h 01 min |
| February 21 | 07:13 | 18:16 | 11 h 03 min |
| March 21 | 06:34 | 18:43 | 12 h 10 min |
| April 21 | 05:49 | 19:11 | 13 h 22 min |
| May 21 | 05:18 | 19:38 | 14 h 20 min |
| June 21 | 05:10 | 19:55 | 14 h 45 min |
| July 21 | 05:26 | 19:48 | 14 h 22 min |
| August 21 | 05:52 | 19:16 | 13 h 24 min |
| September 21 | 06:18 | 18:30 | 12 h 13 min |
| October 21 | 06:44 | 17:46 | 11 h 02 min |
| November 21 | 07:16 | 17:17 | 10 h 01 min |
| December 21 | 07:41 | 17:16 | 9 h 35 min |
Good to know
- Sunrise and sunset are when the top of the Sun meets a level horizon, allowing for the usual bending of light by the air. Hills, buildings and height shift what you see by a few minutes.
- Civil, nautical and astronomical twilight end when the Sun is 6°, 12° and 18° below the horizon. Golden hour here is the photographers’ usual definition: the Sun less than 6° above it.
- Worked out when the page loads from NOAA’s solar equations, for 37.4° N, 127.1° E, and accurate to about a minute.
How the layers work, where their data comes from and what they can’t tell you: Day and night, live, The Sun, Moon and planets
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