Hours of Darkness

No College crew is permitted to be on the water before Lighting Down or after Lighting Up. Crews on the water within 15 minutes of lighting up or lighting down must have static white lights (clearly visible) attached to both the bow and stern of the boat.

Lighting Up and Down times for 2022 are listed in the table below. All of the times are adjusted to BST where applicable. The lighting times for today and tomorrow are available on a WAP phone (http://m.cucbc.org/lighting).

Lighting down is defined as the time when the sun rises to 95° below the zenith, whilst lighting up is the time at which the sun sets to 94° below the zenith.

DayDateLighting DownLighting Up
Tuesday18/01/202207:2716:47
Wednesday19/01/202207:2616:48
Thursday20/01/202207:2516:50
Friday21/01/202207:2416:51
Saturday22/01/202207:2316:53
Sunday23/01/202207:2116:55
Monday24/01/202207:2016:56
Tuesday25/01/202207:1916:58
Wednesday26/01/202207:1817:00
Thursday27/01/202207:1717:01
Friday28/01/202207:1517:03
Saturday29/01/202207:1417:05
Sunday30/01/202207:1217:07
Monday31/01/202207:1117:08
Tuesday01/02/202207:1017:10
Wednesday02/02/202207:0817:12
Thursday03/02/202207:0717:14
Friday04/02/202207:0517:16
Saturday05/02/202207:0317:17
Sunday06/02/202207:0217:19
Monday07/02/202207:0017:21
Tuesday08/02/202206:5817:23
Wednesday09/02/202206:5717:25
Thursday10/02/202206:5517:26
Friday11/02/202206:5317:28
Saturday12/02/202206:5117:30
Sunday13/02/202206:4917:32
Monday14/02/202206:4817:34
Tuesday15/02/202206:4617:35
Wednesday16/02/202206:4417:37
Thursday17/02/202206:4217:39
Friday18/02/202206:4017:41
Saturday19/02/202206:3817:43
Sunday20/02/202206:3617:44
Monday21/02/202206:3417:46
Tuesday22/02/202206:3217:48
Wednesday23/02/202206:3017:50
Thursday24/02/202206:2817:52
Friday25/02/202206:2617:53
Saturday26/02/202206:2417:55
Sunday27/02/202206:2117:57
Monday28/02/202206:1917:59
Tuesday01/03/202206:1718:01
Wednesday02/03/202206:1518:02
Thursday03/03/202206:1318:04
Friday04/03/202206:1118:06
Saturday05/03/202206:0818:08
Sunday06/03/202206:0618:09
Monday07/03/202206:0418:11
Tuesday08/03/202206:0218:13
Wednesday09/03/202205:5918:15
Thursday10/03/202205:5718:17
Friday11/03/202205:5518:18
Saturday12/03/202205:5318:20
Sunday13/03/202205:5018:22
Monday14/03/202205:4818:24
Tuesday15/03/202205:4618:25
Wednesday16/03/202205:4318:27
Thursday17/03/202205:4118:29
Friday18/03/202205:3918:31
Saturday19/03/202205:3618:32
Sunday20/03/202205:3418:34
Monday21/03/202205:3218:36
Tuesday22/03/202205:2918:38
Wednesday23/03/202205:2718:39
Thursday24/03/202205:2518:41
Friday25/03/202205:2218:43
Saturday26/03/202205:2018:45
Sunday27/03/202206:1719:46
Monday28/03/202206:1519:48
Tuesday29/03/202206:1319:50
Wednesday30/03/202206:1019:52
Thursday31/03/202206:0819:54
Friday01/04/202206:0619:55
Saturday02/04/202206:0319:57
Sunday03/04/202206:0119:59
Monday04/04/202205:5820:01
Tuesday05/04/202205:5620:02
Wednesday06/04/202205:5420:04
Thursday07/04/202205:5120:06
Friday08/04/202205:4920:08
Saturday09/04/202205:4720:10
Sunday10/04/202205:4420:11
Monday11/04/202205:4220:13
Tuesday12/04/202205:4020:15
Wednesday13/04/202205:3720:17
Thursday14/04/202205:3520:19
Friday15/04/202205:3320:20
Saturday16/04/202205:3020:22
Sunday17/04/202205:2820:24
Monday18/04/202205:2620:26
Tuesday19/04/202205:2320:28
Wednesday20/04/202205:2120:29
Thursday21/04/202205:1920:31
Friday22/04/202205:1720:33
Saturday23/04/202205:1420:35
Sunday24/04/202205:1220:37
Monday25/04/202205:1020:39
Tuesday26/04/202205:0820:40
Wednesday27/04/202205:0620:42
Thursday28/04/202205:0320:44
Friday29/04/202205:0120:46
Saturday30/04/202204:5920:48
Sunday01/05/202204:5720:50
Monday02/05/202204:5520:51
Tuesday03/05/202204:5320:53
Wednesday04/05/202204:5120:55
Thursday05/05/202204:4920:57
Friday06/05/202204:4720:59
Saturday07/05/202204:4521:00
Sunday08/05/202204:4321:02
Monday09/05/202204:4121:04
Tuesday10/05/202204:3921:06
Wednesday11/05/202204:3721:07
Thursday12/05/202204:3521:09
Friday13/05/202204:3421:11
Saturday14/05/202204:3221:13
Sunday15/05/202204:3021:14
Monday16/05/202204:2821:16
Tuesday17/05/202204:2721:18
Wednesday18/05/202204:2521:19
Thursday19/05/202204:2421:21
Friday20/05/202204:2221:22
Saturday21/05/202204:2121:24
Sunday22/05/202204:1921:26
Monday23/05/202204:1821:27
Tuesday24/05/202204:1621:29
Wednesday25/05/202204:1521:30
Thursday26/05/202204:1421:31
Friday27/05/202204:1221:33
Saturday28/05/202204:1121:34
Sunday29/05/202204:1021:36
Monday30/05/202204:0921:37
Tuesday31/05/202204:0821:38
Wednesday01/06/202204:0721:39
Thursday02/06/202204:0621:41
Friday03/06/202204:0521:42
Saturday04/06/202204:0421:43
Sunday05/06/202204:0321:44
Monday06/06/202204:0321:45
Tuesday07/06/202204:0221:46
Wednesday08/06/202204:0121:47
Thursday09/06/202204:0121:48
Friday10/06/202204:0021:49
Saturday11/06/202204:0021:49
Sunday12/06/202203:5921:50
Monday13/06/202203:5921:51
Tuesday14/06/202203:5921:51
Wednesday15/06/202203:5921:52
Thursday16/06/202203:5921:52
Friday17/06/202203:5921:53
Saturday18/06/202203:5921:53
Sunday19/06/202203:5921:53
Monday20/06/202203:5921:54
Tuesday21/06/202203:5921:54
Wednesday22/06/202203:5921:54
Thursday23/06/202204:0021:54
Friday24/06/202204:0021:54
Saturday25/06/202204:0021:54
Sunday26/06/202204:0121:54
Monday27/06/202204:0221:54
Tuesday28/06/202204:0221:53
Wednesday29/06/202204:0321:53
Thursday30/06/202204:0421:53
Friday01/07/202204:0421:52
Saturday02/07/202204:0521:52
Sunday03/07/202204:0621:51
Monday04/07/202204:0721:51
Tuesday05/07/202204:0821:50
Wednesday06/07/202204:0921:49
Thursday07/07/202204:1021:49
Friday08/07/202204:1121:48
Saturday09/07/202204:1221:47
Sunday10/07/202204:1421:46
Monday11/07/202204:1521:45
Tuesday12/07/202204:1621:44
Wednesday13/07/202204:1821:43
Thursday14/07/202204:1921:42
Friday15/07/202204:2021:41
Saturday16/07/202204:2221:39
Sunday17/07/202204:2321:38
Monday18/07/202204:2521:37
Tuesday19/07/202204:2621:35
Wednesday20/07/202204:2821:34
Thursday21/07/202204:2921:33
Friday22/07/202204:3121:31
Saturday23/07/202204:3321:30
Sunday24/07/202204:3421:28
Monday25/07/202204:3621:26
Tuesday26/07/202204:3821:25
Wednesday27/07/202204:3921:23
Thursday28/07/202204:4121:21
Friday29/07/202204:4321:20
Saturday30/07/202204:4421:18
Sunday31/07/202204:4621:16
Monday01/08/202204:4821:14
Tuesday02/08/202204:5021:12
Wednesday03/08/202204:5121:11
Thursday04/08/202204:5321:09
Friday05/08/202204:5521:07
Saturday06/08/202204:5721:05
Sunday07/08/202204:5921:03
Monday08/08/202205:0021:01
Tuesday09/08/202205:0220:59
Wednesday10/08/202205:0420:57
Thursday11/08/202205:0620:55
Friday12/08/202205:0720:52
Saturday13/08/202205:0920:50
Sunday14/08/202205:1120:48
Monday15/08/202205:1320:46
Tuesday16/08/202205:1520:44
Wednesday17/08/202205:1620:42
Thursday18/08/202205:1820:40
Friday19/08/202205:2020:37
Saturday20/08/202205:2220:35
Sunday21/08/202205:2420:33
Monday22/08/202205:2520:31
Tuesday23/08/202205:2720:28
Wednesday24/08/202205:2920:26
Thursday25/08/202205:3120:24
Friday26/08/202205:3220:21
Saturday27/08/202205:3420:19
Sunday28/08/202205:3620:17
Monday29/08/202205:3820:15
Tuesday30/08/202205:3920:12
Wednesday31/08/202205:4120:10
Thursday01/09/202205:4320:08
Friday02/09/202205:4520:05
Saturday03/09/202205:4620:03
Sunday04/09/202205:4820:00
Monday05/09/202205:5019:58
Tuesday06/09/202205:5219:56
Wednesday07/09/202205:5319:53
Thursday08/09/202205:5519:51
Friday09/09/202205:5719:49
Saturday10/09/202205:5819:46
Sunday11/09/202206:0019:44
Monday12/09/202206:0219:41
Tuesday13/09/202206:0419:39
Wednesday14/09/202206:0519:37
Thursday15/09/202206:0719:34
Friday16/09/202206:0919:32
Saturday17/09/202206:1019:30
Sunday18/09/202206:1219:27
Monday19/09/202206:1419:25
Tuesday20/09/202206:1519:22
Wednesday21/09/202206:1719:20
Thursday22/09/202206:1919:18
Friday23/09/202206:2019:15
Saturday24/09/202206:2219:13
Sunday25/09/202206:2419:11
Monday26/09/202206:2519:08
Tuesday27/09/202206:2719:06
Wednesday28/09/202206:2919:04
Thursday29/09/202206:3019:01
Friday30/09/202206:3218:59
Saturday01/10/202206:3418:57
Sunday02/10/202206:3618:54
Monday03/10/202206:3718:52
Tuesday04/10/202206:3918:50
Wednesday05/10/202206:4118:47
Thursday06/10/202206:4218:45
Friday07/10/202206:4418:43
Saturday08/10/202206:4618:41
Sunday09/10/202206:4718:38
Monday10/10/202206:4918:36
Tuesday11/10/202206:5118:34
Wednesday12/10/202206:5218:32
Thursday13/10/202206:5418:30
Friday14/10/202206:5618:27
Saturday15/10/202206:5718:25
Sunday16/10/202206:5918:23
Monday17/10/202207:0118:21
Tuesday18/10/202207:0318:19
Wednesday19/10/202207:0418:17
Thursday20/10/202207:0618:15
Friday21/10/202207:0818:13
Saturday22/10/202207:0918:11
Sunday23/10/202207:1118:09
Monday24/10/202207:1318:07
Tuesday25/10/202207:1518:05
Wednesday26/10/202207:1618:03
Thursday27/10/202207:1818:01
Friday28/10/202207:2017:59
Saturday29/10/202207:2117:57
Sunday30/10/202206:2316:55
Monday31/10/202206:2516:54
Tuesday01/11/202206:2716:52
Wednesday02/11/202206:2816:50
Thursday03/11/202206:3016:48
Friday04/11/202206:3216:47
Saturday05/11/202206:3316:45
Sunday06/11/202206:3516:43
Monday07/11/202206:3716:42
Tuesday08/11/202206:3916:40
Wednesday09/11/202206:4016:39
Thursday10/11/202206:4216:37
Friday11/11/202206:4416:36
Saturday12/11/202206:4516:34
Sunday13/11/202206:4716:33
Monday14/11/202206:4916:32
Tuesday15/11/202206:5016:30
Wednesday16/11/202206:5216:29
Thursday17/11/202206:5316:28
Friday18/11/202206:5516:27
Saturday19/11/202206:5716:25
Sunday20/11/202206:5816:24
Monday21/11/202207:0016:23
Tuesday22/11/202207:0116:22
Wednesday23/11/202207:0316:21
Thursday24/11/202207:0416:20
Friday25/11/202207:0616:19
Saturday26/11/202207:0716:19
Sunday27/11/202207:0916:18
Monday28/11/202207:1016:17
Tuesday29/11/202207:1116:16
Wednesday30/11/202207:1316:16
Thursday01/12/202207:1416:15
Friday02/12/202207:1516:15
Saturday03/12/202207:1716:14
Sunday04/12/202207:1816:14
Monday05/12/202207:1916:13
Tuesday06/12/202207:2016:13
Wednesday07/12/202207:2116:13
Thursday08/12/202207:2316:13
Friday09/12/202207:2416:12
Saturday10/12/202207:2516:12
Sunday11/12/202207:2616:12
Monday12/12/202207:2716:12
Tuesday13/12/202207:2716:12
Wednesday14/12/202207:2816:12
Thursday15/12/202207:2916:13
Friday16/12/202207:3016:13
Saturday17/12/202207:3116:13
Sunday18/12/202207:3116:13
Monday19/12/202207:3216:14
Tuesday20/12/202207:3216:14
Wednesday21/12/202207:3316:15
Thursday22/12/202207:3316:15
Friday23/12/202207:3416:16
Saturday24/12/202207:3416:16
Sunday25/12/202207:3516:17
Monday26/12/202207:3516:18
Tuesday27/12/202207:3516:19
Wednesday28/12/202207:3516:20
Thursday29/12/202207:3516:20
Friday30/12/202207:3516:21
Saturday31/12/202207:3516:22

XML and CSV files of the hours of darkness for the current year are available. Other webmasters may wish to use these to display the lighting up and down times on their own websites.

» XML Data for 2022
» CSV Data for 2022

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