Daylight duration
We show daylight length in Heard Island Central Terrotory during December 2025 and the daylight length for the equinox and solstice for comparing. From December 1, 2025 until December 21, 2025, daylight becomes longer. From December 22, 2025 until December 31, 2025, daylight becomes shorter.
Sunrise and Sunset
Times of sunrise and sunset in Heard Island Central Terrotory during December 2025.
Taking December 1, 2025 as reference, the sun rises at 03:39:01 at 129.62°ESE (East-southeast) and sets at 20:11:23 at 166.55°SSE (South-southeast). Sunrise and sunset take approximately 4.58 minutes to complete. Read more about sunrise and sunset.
Taking December 15, 2025 as reference, the sun rises at 03:33:48 at 132.61°ESE (East-southeast) and sets at 20:28:19 at 164.94°SSE (South-southeast). Sunrise and sunset take approximately 4.78 minutes to complete. Read more about sunrise and sunset.
Solar Events
| 2025 | Daylength | Dawn | Sunset | Solar Noon | Sunrise | Dusk | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dec | Length | Difference | Ast. | Nau. | Civ. | Start | Azimuth | End | Start | Azimuth | End | Civ. | Nau. | Ast. | |
| 1 | 16h 32m 22s | - | - | 01:35 | 02:50 | 03:39 | 130°ESE | 03:43 | 11:54 | 20:06 | 167°SSE | 20:11 | 20:59 | 22:15 | - |
| 2 | 16h 34m 38s | +2.3m | - | 01:33 | 02:49 | 03:38 | 130°ESE | 03:42 | 11:55 | 20:08 | 166°SSE | 20:12 | 21:01 | 22:18 | - |
| 3 | 16h 36m 48s | +2.2m | - | 01:31 | 02:48 | 03:37 | 130°ESE | 03:42 | 11:55 | 20:09 | 166°SSE | 20:14 | 21:03 | 22:21 | - |
| 4 | 16h 38m 52s | +2.1m | - | 01:29 | 02:47 | 03:36 | 131°ESE | 03:41 | 11:55 | 20:11 | 166°SSE | 20:15 | 21:05 | 22:24 | - |
| 5 | 16h 40m 50s | +2m | - | 01:27 | 02:46 | 03:36 | 131°ESE | 03:40 | 11:56 | 20:12 | 166°SSE | 20:17 | 21:06 | 22:26 | - |
| 6 | 16h 42m 42s | +1.9m | - | 01:26 | 02:46 | 03:35 | 131°ESE | 03:40 | 11:56 | 20:13 | 166°SSE | 20:18 | 21:08 | 22:29 | - |
| 7 | 16h 44m 27s | +1.8m | - | 01:24 | 02:45 | 03:35 | 131°ESE | 03:40 | 11:57 | 20:15 | 166°SSE | 20:19 | 21:09 | 22:31 | - |
| 8 | 16h 46m 07s | +1.7m | - | 01:22 | 02:44 | 03:34 | 131°ESE | 03:39 | 11:57 | 20:16 | 166°SSE | 20:21 | 21:11 | 22:34 | - |
| 9 | 16h 47m 40s | +1.6m | - | 01:21 | 02:44 | 03:34 | 132°ESE | 03:39 | 11:58 | 20:17 | 166°SSE | 20:22 | 21:12 | 22:36 | - |
| 10 | 16h 49m 06s | +1.4m | - | 01:19 | 02:43 | 03:34 | 132°ESE | 03:39 | 11:58 | 20:18 | 166°SSE | 20:23 | 21:14 | 22:38 | - |
| 11 | 16h 50m 25s | +1.3m | - | 01:18 | 02:43 | 03:34 | 132°ESE | 03:38 | 11:59 | 20:19 | 165°SSE | 20:24 | 21:15 | 22:40 | - |
| 12 | 16h 51m 38s | +1.2m | - | 01:17 | 02:43 | 03:33 | 132°ESE | 03:38 | 11:59 | 20:20 | 165°SSE | 20:25 | 21:16 | 22:42 | - |
| 13 | 16h 52m 42s | +1.1m | - | 01:16 | 02:42 | 03:33 | 132°ESE | 03:38 | 11:59 | 20:21 | 165°SSE | 20:26 | 21:17 | 22:44 | - |
| 14 | 16h 53m 40s | +58s | - | 01:15 | 02:42 | 03:33 | 132°ESE | 03:38 | 12:00 | 20:22 | 165°SSE | 20:27 | 21:18 | 22:46 | - |
| 15 | 16h 54m 31s | +51s | - | 01:14 | 02:42 | 03:33 | 133°ESE | 03:38 | 12:00 | 20:23 | 165°SSE | 20:28 | 21:19 | 22:48 | - |
| 16 | 16h 55m 15s | +44s | - | 01:14 | 02:42 | 03:33 | 133°ESE | 03:38 | 12:01 | 20:24 | 165°SSE | 20:29 | 21:20 | 22:49 | - |
| 17 | 16h 55m 51s | +36s | - | 01:13 | 02:42 | 03:34 | 133°ESE | 03:38 | 12:01 | 20:25 | 165°SSE | 20:29 | 21:21 | 22:50 | - |
| 18 | 16h 56m 20s | +29s | - | 01:13 | 02:42 | 03:34 | 133°ESE | 03:39 | 12:02 | 20:25 | 165°SSE | 20:30 | 21:22 | 22:51 | - |
| 19 | 16h 56m 41s | +21s | - | 01:13 | 02:42 | 03:34 | 133°ESE | 03:39 | 12:02 | 20:26 | 164°SSE | 20:31 | 21:22 | 22:52 | - |
| 20 | 16h 56m 56s | +15s | - | 01:13 | 02:43 | 03:34 | 133°ESE | 03:39 | 12:03 | 20:27 | 164°SSE | 20:31 | 21:23 | 22:53 | - |
| 21 | 16h 57m 01s | +5s | - | 01:13 | 02:43 | 03:35 | 133°ESE | 03:40 | 12:03 | 20:27 | 164°SSE | 20:32 | 21:24 | 22:54 | - |
| 22 | 16h 57m 00s | -1s | - | 01:14 | 02:44 | 03:35 | 133°ESE | 03:40 | 12:04 | 20:28 | 164°SSE | 20:32 | 21:24 | 22:54 | - |
| 23 | 16h 56m 52s | -8s | - | 01:14 | 02:44 | 03:36 | 133°ESE | 03:41 | 12:04 | 20:28 | 164°SSE | 20:33 | 21:24 | 22:54 | - |
| 24 | 16h 56m 35s | -17s | - | 01:15 | 02:45 | 03:37 | 133°ESE | 03:41 | 12:05 | 20:28 | 164°SSE | 20:33 | 21:25 | 22:54 | - |
| 25 | 16h 56m 12s | -23s | - | 01:16 | 02:46 | 03:37 | 133°ESE | 03:42 | 12:05 | 20:29 | 164°SSE | 20:33 | 21:25 | 22:54 | - |
| 26 | 16h 55m 40s | -32s | - | 01:17 | 02:46 | 03:38 | 133°ESE | 03:43 | 12:06 | 20:29 | 164°SSE | 20:34 | 21:25 | 22:54 | - |
| 27 | 16h 55m 01s | -39s | - | 01:19 | 02:47 | 03:39 | 133°ESE | 03:43 | 12:06 | 20:29 | 164°SSE | 20:34 | 21:25 | 22:53 | - |
| 28 | 16h 54m 15s | -46s | - | 01:20 | 02:48 | 03:40 | 133°ESE | 03:44 | 12:07 | 20:29 | 163°SSE | 20:34 | 21:25 | 22:53 | - |
| 29 | 16h 53m 22s | -53s | - | 01:22 | 02:49 | 03:40 | 133°ESE | 03:45 | 12:07 | 20:29 | 163°SSE | 20:34 | 21:25 | 22:52 | - |
| 30 | 16h 52m 22s | -1m | - | 01:23 | 02:50 | 03:41 | 132°ESE | 03:46 | 12:08 | 20:29 | 163°SSE | 20:34 | 21:25 | 22:51 | - |
| 31 | 16h 51m 13s | -1.2m | - | 01:25 | 02:51 | 03:42 | 132°ESE | 03:47 | 12:08 | 20:29 | 163°SSE | 20:34 | 21:24 | 22:50 | - |
