sun .5deg.comSunrise, Sunset, Solar noon and Sun position here: Longyearbyen, Svalbard and Jan Mayen (Svalbard, Spitsbergen), for period: September 2021. Longest day in month: September 2021: 18 hours, 33 minutes, 4 seconds (2021-09-01). Shortest day in this month: 10 hours, 38 minutes , 25 seconds (2021-09-30).
:September 2021, Solar noon=>Altitude: maximal 20.02° (2021-09-01, 12:57:21). minimal: 8.95° (2021-09-30, 12:47:19)
Table view of above data:
| date | Day | Sunrise | Solar noon | Sunset | Day Length |
| 01 | Wednesday | 03:40:49 | 12:57:21 | 22:13:53 | 18h 33m 4s |
| 02 | Thursday | 03:51:08 | 12:57:02 | 22:02:55 | 18h 11m 47s |
| 03 | Friday | 04:00:59 | 12:56:42 | 21:52:25 | 17h 51m 26s |
| 04 | Saturday | 04:10:27 | 12:56:22 | 21:42:17 | 17h 31m 50s |
| 05 | Sunday | 04:19:35 | 12:56:02 | 21:32:29 | 17h 12m 54s |
| 06 | Monday | 04:28:27 | 12:55:42 | 21:22:57 | 16h 54m 30s |
| 07 | Tuesday | 04:37:03 | 12:55:21 | 21:13:40 | 16h 36m 37s |
| 08 | Wednesday | 04:45:27 | 12:55:01 | 21:04:35 | 16h 19m 8s |
| 09 | Thursday | 04:53:40 | 12:54:40 | 20:55:40 | 16h 2m 0s |
| 10 | Friday | 05:01:42 | 12:54:19 | 20:46:56 | 15h 45m 14s |
| 11 | Saturday | 05:09:37 | 12:53:58 | 20:38:19 | 15h 28m 42s |
| 12 | Sunday | 05:17:23 | 12:53:37 | 20:29:50 | 15h 12m 27s |
| 13 | Monday | 05:25:03 | 12:53:15 | 20:21:28 | 14h 56m 25s |
| 14 | Tuesday | 05:32:37 | 12:52:54 | 20:13:11 | 14h 40m 34s |
| 15 | Wednesday | 05:40:06 | 12:52:33 | 20:05:00 | 14h 24m 54s |
| 16 | Thursday | 05:47:30 | 12:52:11 | 19:56:53 | 14h 9m 23s |
| 17 | Friday | 05:54:50 | 12:51:50 | 19:48:49 | 13h 53m 59s |
| 18 | Saturday | 06:02:07 | 12:51:28 | 19:40:50 | 13h 38m 43s |
| 19 | Sunday | 06:09:21 | 12:51:07 | 19:32:53 | 13h 23m 32s |
| 20 | Monday | 06:16:33 | 12:50:46 | 19:24:58 | 13h 8m 25s |
| 21 | Tuesday | 06:23:43 | 12:50:24 | 19:17:05 | 12h 53m 22s |
| 22 | Wednesday | 06:30:52 | 12:50:03 | 19:09:14 | 12h 38m 22s |
| 23 | Thursday | 06:38:00 | 12:49:42 | 19:01:24 | 12h 23m 24s |
| 24 | Friday | 06:45:08 | 12:49:21 | 18:53:35 | 12h 8m 27s |
| 25 | Saturday | 06:52:15 | 12:49:00 | 18:45:46 | 11h 53m 31s |
| 26 | Sunday | 06:59:23 | 12:48:40 | 18:37:57 | 11h 38m 34s |
| 27 | Monday | 07:06:32 | 12:48:19 | 18:30:07 | 11h 23m 35s |
| 28 | Tuesday | 07:13:41 | 12:47:59 | 18:22:17 | 11h 8m 36s |
| 29 | Wednesday | 07:20:53 | 12:47:39 | 18:14:25 | 10h 53m 32s |
| 30 | Thursday | 07:28:07 | 12:47:19 | 18:06:32 | 10h 38m 25s |