sun .5deg.comSunrise, Sunset, Solar noon and Sun position here: Longyearbyen, Svalbard and Jan Mayen (Svalbard, Spitsbergen), for period: April 2021. Longest day in month: April 2021: 24 hours, 0 minutes, 0 seconds (2021-04-18). Shortest day in this month: 15 hours, 43 minutes , 49 seconds (2021-04-01).
:April 2021, Solar noon=>Altitude: maximal 26.58° (2021-04-30, 12:54:36). minimal: 16.36° (2021-04-01, 13:01:13)
Table view of above data:
| date | Day | Sunrise | Solar noon | Sunset | Day Length |
| 01 | Thursday | 05:09:18 | 13:01:13 | 20:53:07 | 15h 43m 49s |
| 02 | Friday | 05:00:30 | 13:00:55 | 21:01:20 | 16h 0m 50s |
| 03 | Saturday | 04:51:32 | 13:00:37 | 21:09:43 | 16h 18m 11s |
| 04 | Sunday | 04:42:22 | 13:00:20 | 21:18:18 | 16h 35m 56s |
| 05 | Monday | 04:33:00 | 13:00:03 | 21:27:05 | 16h 54m 5s |
| 06 | Tuesday | 04:23:24 | 12:59:46 | 21:36:08 | 17h 12m 44s |
| 07 | Wednesday | 04:13:30 | 12:59:29 | 21:45:28 | 17h 31m 58s |
| 08 | Thursday | 04:03:17 | 12:59:12 | 21:55:08 | 17h 51m 51s |
| 09 | Friday | 03:52:40 | 12:58:56 | 22:05:12 | 18h 12m 32s |
| 10 | Saturday | 03:41:35 | 12:58:40 | 22:15:45 | 18h 34m 10s |
| 11 | Sunday | 03:29:56 | 12:58:24 | 22:26:52 | 18h 56m 56s |
| 12 | Monday | 03:17:33 | 12:58:08 | 22:38:44 | 19h 21m 11s |
| 13 | Tuesday | 03:04:15 | 12:57:53 | 22:51:32 | 19h 47m 17s |
| 14 | Wednesday | 02:49:41 | 12:57:38 | 23:05:36 | 20h 15m 55s |
| 15 | Thursday | 02:33:16 | 12:57:24 | 23:21:31 | 20h 48m 15s |
| 16 | Friday | 02:13:53 | 12:57:10 | 23:40:26 | 21h 26m 33s |
| 17 | Saturday | 01:48:15 | 12:56:56 | 00:05:37 | 22h 17m 22s |
| 18 | Sunday | 00:00:00 | 12:56:42 | 24:00:00 | 24h 0m 0s |
| 19 | Monday | 00:00:00 | 12:56:29 | 24:00:00 | 24h 0m 0s |
| 20 | Tuesday | 00:00:00 | 12:56:17 | 24:00:00 | 24h 0m 0s |
| 21 | Wednesday | 00:00:00 | 12:56:05 | 24:00:00 | 24h 0m 0s |
| 22 | Thursday | 00:00:00 | 12:55:53 | 24:00:00 | 24h 0m 0s |
| 23 | Friday | 00:00:00 | 12:55:42 | 24:00:00 | 24h 0m 0s |
| 24 | Saturday | 00:00:00 | 12:55:31 | 24:00:00 | 24h 0m 0s |
| 25 | Sunday | 00:00:00 | 12:55:20 | 24:00:00 | 24h 0m 0s |
| 26 | Monday | 00:00:00 | 12:55:11 | 24:00:00 | 24h 0m 0s |
| 27 | Tuesday | 00:00:00 | 12:55:01 | 24:00:00 | 24h 0m 0s |
| 28 | Wednesday | 00:00:00 | 12:54:52 | 24:00:00 | 24h 0m 0s |
| 29 | Thursday | 00:00:00 | 12:54:44 | 24:00:00 | 24h 0m 0s |
| 30 | Friday | 00:00:00 | 12:54:36 | 24:00:00 | 24h 0m 0s |