Living so far north for the first time, one of the most noticeable differences compared to where I have lived before is the length of day.
Below is a table showing the hours of daylight in my hometown Ramsgate, Kent, England, (Lat 51.3345, Long 1.4207), followed by the same information for Kauhava, Finland, (Lat 63.0998, Long 23.0565).
Civil Twilight, when the sun is less than 6 degrees below the horizon, is when it is still light enough to perform normal outdoor activities such as outdoor sports like tennis or football. This is followed by Nautical Twilight, when the sun is between 6 and 12 degrees below the horizon, and when an aeroplane must be equipped with the correct lights for flying. Astronomical Twilight is when the sun is between 12 and 18 degrees below the horizon and it is only when the sun is more than 18 degrees below the horizon that all astronomical observations can be made.
For Ramsgate I have highlighted in yellow the period from the earliest sunrise to the latest sunset. I have done the same in orange for Kauhava in Finland and highlighted in yellow the period of 24 hours of light including Civil Twilight; a total of 54 days.
CTS: Civil Twilight Start, SR: Sunrise, SS: Sunset, CTE: Civil Twilight End
Ramsgate, Kent, England, (Lat 51.3345, Long 1.4207)
May 2012 Jun Jul CTS SR SS CTE CTS SR SS CTE CTS SR SS CTE 1 04:47 05:26 20:18 20:56 03:58 04:43 21:02 21:47 03:56 04:43 21:14 22:00 2 04:45 05:24 20:20 20:58 03:57 04:42 21:03 21:48 03:57 04:43 21:13 22:00 3 04:43 05:22 20:21 21:00 03:56 04:42 21:04 21:50 03:58 04:44 21:13 21:59 4 04:41 05:20 20:23 21:02 03:55 04:41 21:05 21:51 03:59 04:45 21:12 21:59 5 04:39 05:18 20:24 21:04 03:54 04:40 21:06 21:52 04:00 04:46 21:12 21:58 6 04:37 05:17 20:26 21:05 03:54 04:40 21:07 21:53 04:01 04:47 21:11 21:57 7 04:35 05:15 20:28 21:07 03:53 04:39 21:07 21:54 04:02 04:48 21:11 21:56 8 04:33 05:13 20:29 21:09 03:53 04:39 21:08 21:55 04:03 04:49 21:10 21:55 9 04:32 05:12 20:31 21:11 03:52 04:39 21:09 21:56 04:04 04:50 21:09 21:54 10 04:30 05:10 20:32 21:13 03:52 04:38 21:10 21:56 04:05 04:51 21:08 21:54 11 04:28 05:08 20:34 21:14 03:51 04:38 21:10 21:57 04:07 04:52 21:08 21:53 12 04:26 05:07 20:35 21:16 03:51 04:38 21:11 21:58 04:08 04:53 21:07 21:51 13 04:24 05:05 20:37 21:18 03:51 04:38 21:12 21:59 04:09 04:54 21:06 21:50 14 04:23 05:04 20:38 21:20 03:50 04:37 21:12 21:59 04:11 04:55 21:05 21:49 15 04:21 05:02 20:40 21:21 03:50 04:37 21:13 22:00 04:12 04:56 21:04 21:48 16 04:19 05:01 20:41 21:23 03:50 04:37 21:13 22:00 04:13 04:57 21:03 21:47 17 04:18 04:59 20:43 21:25 03:50 04:37 21:13 22:01 04:15 04:59 21:02 21:45 18 04:16 04:58 20:44 21:26 03:50 04:37 21:14 22:01 04:16 05:00 21:01 21:44 19 04:14 04:57 20:46 21:28 03:50 04:38 21:14 22:01 04:18 05:01 20:59 21:43 20 04:13 04:55 20:47 21:30 03:50 04:38 21:14 22:02 04:19 05:03 20:58 21:41 21 04:11 04:54 20:48 21:31 03:51 04:38 21:14 22:02 04:21 05:04 20:57 21:40 22 04:10 04:53 20:50 21:33 03:51 04:38 21:15 22:02 04:23 05:05 20:56 21:38 23 04:08 04:52 20:51 21:34 03:51 04:39 21:15 22:02 04:24 05:07 20:54 21:37 24 04:07 04:51 20:52 21:36 03:52 04:39 21:15 22:02 04:26 05:08 20:53 21:35 25 04:06 04:50 20:54 21:37 03:52 04:39 21:15 22:02 04:27 05:09 20:52 21:33 26 04:05 04:48 20:55 21:39 03:53 04:40 21:15 22:02 04:29 05:11 20:50 21:32 27 04:03 04:47 20:56 21:40 03:53 04:40 21:15 22:02 04:31 05:12 20:49 21:30 28 04:02 04:47 20:57 21:42 03:54 04:41 21:14 22:01 04:32 05:14 20:47 21:28 29 04:01 04:46 20:58 21:43 03:54 04:41 21:14 22:01 04:34 05:15 20:46 21:26 30 04:00 04:45 21:00 21:45 03:55 04:42 21:14 22:01 04:36 05:17 20:44 21:25 31 03:59 04:44 21:01 21:46 04:38 05:18 20:42 21:23
Kauhava, Finland, (Lat 63.0998, Long 23.0565)
May 2012 Jun Jul
CTS SR SS CTE CTS SR SS CTE CTS SR SS CTE
1 04:02 05:06 21:45 22:50 DAY 03:40 23:13 DAY DAY 03:29 23:33 DAY
2 03:57 05:03 21:48 22:54 DAY 03:38 23:15 DAY DAY 03:31 23:32 DAY
3 03:53 05:00 21:51 22:58 DAY 03:36 23:17 DAY DAY 03:33 23:31 DAY
4 03:49 04:56 21:54 23:02 DAY 03:34 23:19 DAY DAY 03:34 23:29 DAY
5 03:44 04:53 21:57 23:07 DAY 03:32 23:21 DAY DAY 03:36 23:28 DAY
6 03:40 04:50 22:00 23:11 DAY 03:31 23:23 DAY DAY 03:38 23:26 DAY
7 03:35 04:47 22:03 23:15 DAY 03:29 23:25 DAY DAY 03:40 23:24 DAY
8 03:31 04:44 22:06 23:20 DAY 03:28 23:27 DAY DAY 03:43 23:22 DAY
9 03:26 04:41 22:09 23:25 DAY 03:26 23:29 DAY DAY 03:45 23:20 DAY
10 03:21 04:38 22:12 23:29 DAY 03:25 23:30 DAY DAY 03:47 23:18 DAY
11 03:17 04:35 22:15 23:34 DAY 03:24 23:32 DAY DAY 03:49 23:16 DAY
12 03:12 04:32 22:18 23:39 DAY 03:23 23:33 DAY DAY 03:52 23:14 DAY
13 03:07 04:29 22:21 23:44 DAY 03:22 23:34 DAY DAY 03:54 23:12 DAY
14 03:02 04:26 22:24 23:49 DAY 03:21 23:35 DAY DAY 03:57 23:09 DAY
15 02:56 04:23 22:27 23:55 DAY 03:21 23:36 DAY DAY 03:59 23:07 DAY
16 02:51 04:20 22:30 00:00 DAY 03:20 23:37 DAY DAY 04:02 23:05 DAY
17 02:45 04:17 22:33 00:06 DAY 03:20 23:38 DAY DAY 04:05 23:02 DAY
18 02:39 04:14 22:35 00:13 DAY 03:20 23:38 DAY 01:52 04:07 22:59 01:07
19 02:33 04:12 22:38 00:19 DAY 03:20 23:39 DAY 02:07 04:10 22:57 00:55
20 02:26 04:09 22:41 00:27 DAY 03:20 23:39 DAY 02:18 04:13 22:54 00:46
21 02:18 04:06 22:44 00:35 DAY 03:20 23:39 DAY 02:27 04:15 22:52 00:38
22 02:10 04:03 22:47 00:44 DAY 03:20 23:39 DAY 02:34 04:18 22:49 00:31
23 02:00 04:01 22:50 00:56 DAY 03:21 23:39 DAY 02:41 04:21 22:46 00:24
24 01:46 03:58 22:52 01:17 DAY 03:21 23:39 DAY 02:48 04:24 22:43 00:18
25 DAY 03:56 22:55 DAY DAY 03:22 23:39 DAY 02:54 04:27 22:40 00:12
26 DAY 03:53 22:58 DAY DAY 03:23 23:38 DAY 03:00 04:30 22:38 00:06
27 DAY 03:51 23:00 DAY DAY 03:24 23:37 DAY 03:05 04:32 22:35 00:01
28 DAY 03:49 23:03 DAY DAY 03:25 23:36 DAY 03:10 04:35 22:32 23:55
29 DAY 03:46 23:05 DAY DAY 03:27 23:36 DAY 03:16 04:38 22:29 23:50
30 DAY 03:44 23:08 DAY DAY 03:28 23:35 DAY 03:21 04:41 22:26 23:45
31 DAY 03:42 23:10 DAY 03:25 04:44 22:23 23:40
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