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 2016 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
Monday08/02/201606:5917:22
Tuesday09/02/201606:5817:24
Wednesday10/02/201606:5617:25
Thursday11/02/201606:5417:27
Friday12/02/201606:5217:29
Saturday13/02/201606:5017:31
Sunday14/02/201606:4917:33
Monday15/02/201606:4717:34
Tuesday16/02/201606:4517:36
Wednesday17/02/201606:4317:38
Thursday18/02/201606:4117:40
Friday19/02/201606:3917:42
Saturday20/02/201606:3717:43
Sunday21/02/201606:3517:45
Monday22/02/201606:3317:47
Tuesday23/02/201606:3117:49
Wednesday24/02/201606:2917:51
Thursday25/02/201606:2717:52
Friday26/02/201606:2517:54
Saturday27/02/201606:2317:56
Sunday28/02/201606:2117:58
Monday29/02/201606:1818:00
Tuesday01/03/201606:1618:01
Wednesday02/03/201606:1418:03
Thursday03/03/201606:1218:05
Friday04/03/201606:1018:07
Saturday05/03/201606:0718:09
Sunday06/03/201606:0518:10
Monday07/03/201606:0318:12
Tuesday08/03/201606:0118:14
Wednesday09/03/201605:5818:16
Thursday10/03/201605:5618:17
Friday11/03/201605:5418:19
Saturday12/03/201605:5218:21
Sunday13/03/201605:4918:23
Monday14/03/201605:4718:24
Tuesday15/03/201605:4518:26
Wednesday16/03/201605:4218:28
Thursday17/03/201605:4018:30
Friday18/03/201605:3818:31
Saturday19/03/201605:3518:33
Sunday20/03/201605:3318:35
Monday21/03/201605:3118:37
Tuesday22/03/201605:2818:38
Wednesday23/03/201605:2618:40
Thursday24/03/201605:2318:42
Friday25/03/201605:2118:44
Saturday26/03/201605:1918:46
Sunday27/03/201606:1619:47
Monday28/03/201606:1419:49
Tuesday29/03/201606:1219:51
Wednesday30/03/201606:0919:53
Thursday31/03/201606:0719:54
Friday01/04/201606:0419:56
Saturday02/04/201606:0219:58
Sunday03/04/201606:0020:00
Monday04/04/201605:5720:01
Tuesday05/04/201605:5520:03
Wednesday06/04/201605:5320:05
Thursday07/04/201605:5020:07
Friday08/04/201605:4820:09
Saturday09/04/201605:4620:10
Sunday10/04/201605:4320:12
Monday11/04/201605:4120:14
Tuesday12/04/201605:3820:16
Wednesday13/04/201605:3620:18
Thursday14/04/201605:3420:19
Friday15/04/201605:3220:21
Saturday16/04/201605:2920:23
Sunday17/04/201605:2720:25
Monday18/04/201605:2520:27
Tuesday19/04/201605:2220:28
Wednesday20/04/201605:2020:30
Thursday21/04/201605:1820:32
Friday22/04/201605:1620:34
Saturday23/04/201605:1320:36
Sunday24/04/201605:1120:38
Monday25/04/201605:0920:39
Tuesday26/04/201605:0720:41
Wednesday27/04/201605:0520:43
Thursday28/04/201605:0220:45
Friday29/04/201605:0020:47
Saturday30/04/201604:5820:49
Sunday01/05/201604:5620:50
Monday02/05/201604:5420:52
Tuesday03/05/201604:5220:54
Wednesday04/05/201604:5020:56
Thursday05/05/201604:4820:58
Friday06/05/201604:4620:59
Saturday07/05/201604:4421:01
Sunday08/05/201604:4221:03
Monday09/05/201604:4021:05
Tuesday10/05/201604:3821:06
Wednesday11/05/201604:3621:08
Thursday12/05/201604:3521:10
Friday13/05/201604:3321:12
Saturday14/05/201604:3121:13
Sunday15/05/201604:2921:15
Monday16/05/201604:2821:17
Tuesday17/05/201604:2621:18
Wednesday18/05/201604:2421:20
Thursday19/05/201604:2321:22
Friday20/05/201604:2121:23
Saturday21/05/201604:2021:25
Sunday22/05/201604:1821:26
Monday23/05/201604:1721:28
Tuesday24/05/201604:1621:29
Wednesday25/05/201604:1421:31
Thursday26/05/201604:1321:32
Friday27/05/201604:1221:34
Saturday28/05/201604:1121:35
Sunday29/05/201604:0921:36
Monday30/05/201604:0821:38
Tuesday31/05/201604:0721:39
Wednesday01/06/201604:0621:40
Thursday02/06/201604:0521:41
Friday03/06/201604:0521:42
Saturday04/06/201604:0421:43
Sunday05/06/201604:0321:44
Monday06/06/201604:0221:45
Tuesday07/06/201604:0221:46
Wednesday08/06/201604:0121:47
Thursday09/06/201604:0121:48
Friday10/06/201604:0021:49
Saturday11/06/201604:0021:50
Sunday12/06/201603:5921:50
Monday13/06/201603:5921:51
Tuesday14/06/201603:5921:51
Wednesday15/06/201603:5921:52
Thursday16/06/201603:5921:52
Friday17/06/201603:5921:53
Saturday18/06/201603:5921:53
Sunday19/06/201603:5921:53
Monday20/06/201603:5921:54
Tuesday21/06/201603:5921:54
Wednesday22/06/201603:5921:54
Thursday23/06/201604:0021:54
Friday24/06/201604:0021:54
Saturday25/06/201604:0121:54
Sunday26/06/201604:0121:54
Monday27/06/201604:0221:54
Tuesday28/06/201604:0221:53
Wednesday29/06/201604:0321:53
Thursday30/06/201604:0421:53
Friday01/07/201604:0521:52
Saturday02/07/201604:0621:52
Sunday03/07/201604:0621:51
Monday04/07/201604:0721:50
Tuesday05/07/201604:0821:50
Wednesday06/07/201604:1021:49
Thursday07/07/201604:1121:48
Friday08/07/201604:1221:47
Saturday09/07/201604:1321:46
Sunday10/07/201604:1421:46
Monday11/07/201604:1621:45
Tuesday12/07/201604:1721:43
Wednesday13/07/201604:1821:42
Thursday14/07/201604:2021:41
Friday15/07/201604:2121:40
Saturday16/07/201604:2221:39
Sunday17/07/201604:2421:38
Monday18/07/201604:2521:36
Tuesday19/07/201604:2721:35
Wednesday20/07/201604:2921:33
Thursday21/07/201604:3021:32
Friday22/07/201604:3221:30
Saturday23/07/201604:3321:29
Sunday24/07/201604:3521:27
Monday25/07/201604:3721:26
Tuesday26/07/201604:3821:24
Wednesday27/07/201604:4021:22
Thursday28/07/201604:4221:21
Friday29/07/201604:4321:19
Saturday30/07/201604:4521:17
Sunday31/07/201604:4721:15
Monday01/08/201604:4921:13
Tuesday02/08/201604:5021:12
Wednesday03/08/201604:5221:10
Thursday04/08/201604:5421:08
Friday05/08/201604:5621:06
Saturday06/08/201604:5821:04
Sunday07/08/201604:5921:02
Monday08/08/201605:0121:00
Tuesday09/08/201605:0320:58
Wednesday10/08/201605:0520:56
Thursday11/08/201605:0620:54
Friday12/08/201605:0820:52
Saturday13/08/201605:1020:49
Sunday14/08/201605:1220:47
Monday15/08/201605:1420:45
Tuesday16/08/201605:1520:43
Wednesday17/08/201605:1720:41
Thursday18/08/201605:1920:39
Friday19/08/201605:2120:36
Saturday20/08/201605:2320:34
Sunday21/08/201605:2420:32
Monday22/08/201605:2620:30
Tuesday23/08/201605:2820:27
Wednesday24/08/201605:3020:25
Thursday25/08/201605:3120:23
Friday26/08/201605:3320:20
Saturday27/08/201605:3520:18
Sunday28/08/201605:3720:16
Monday29/08/201605:3920:13
Tuesday30/08/201605:4020:11
Wednesday31/08/201605:4220:09
Thursday01/09/201605:4420:06
Friday02/09/201605:4520:04
Saturday03/09/201605:4720:02
Sunday04/09/201605:4919:59
Monday05/09/201605:5119:57
Tuesday06/09/201605:5219:55
Wednesday07/09/201605:5419:52
Thursday08/09/201605:5619:50
Friday09/09/201605:5819:47
Saturday10/09/201605:5919:45
Sunday11/09/201606:0119:43
Monday12/09/201606:0319:40
Tuesday13/09/201606:0419:38
Wednesday14/09/201606:0619:36
Thursday15/09/201606:0819:33
Friday16/09/201606:0919:31
Saturday17/09/201606:1119:28
Sunday18/09/201606:1319:26
Monday19/09/201606:1419:24
Tuesday20/09/201606:1619:21
Wednesday21/09/201606:1819:19
Thursday22/09/201606:2019:17
Friday23/09/201606:2119:14
Saturday24/09/201606:2319:12
Sunday25/09/201606:2519:09
Monday26/09/201606:2619:07
Tuesday27/09/201606:2819:05
Wednesday28/09/201606:3019:02
Thursday29/09/201606:3119:00
Friday30/09/201606:3318:58
Saturday01/10/201606:3518:56
Sunday02/10/201606:3618:53
Monday03/10/201606:3818:51
Tuesday04/10/201606:4018:49
Wednesday05/10/201606:4118:46
Thursday06/10/201606:4318:44
Friday07/10/201606:4518:42
Saturday08/10/201606:4618:40
Sunday09/10/201606:4818:37
Monday10/10/201606:5018:35
Tuesday11/10/201606:5118:33
Wednesday12/10/201606:5318:31
Thursday13/10/201606:5518:29
Friday14/10/201606:5718:26
Saturday15/10/201606:5818:24
Sunday16/10/201607:0018:22
Monday17/10/201607:0218:20
Tuesday18/10/201607:0318:18
Wednesday19/10/201607:0518:16
Thursday20/10/201607:0718:14
Friday21/10/201607:0818:12
Saturday22/10/201607:1018:10
Sunday23/10/201607:1218:08
Monday24/10/201607:1418:06
Tuesday25/10/201607:1518:04
Wednesday26/10/201607:1718:02
Thursday27/10/201607:1918:00
Friday28/10/201607:2017:58
Saturday29/10/201607:2217:56
Sunday30/10/201606:2416:55
Monday31/10/201606:2616:53
Tuesday01/11/201606:2716:51
Wednesday02/11/201606:2916:49
Thursday03/11/201606:3116:48
Friday04/11/201606:3316:46
Saturday05/11/201606:3416:44
Sunday06/11/201606:3616:43
Monday07/11/201606:3816:41
Tuesday08/11/201606:3916:40
Wednesday09/11/201606:4116:38
Thursday10/11/201606:4316:37
Friday11/11/201606:4416:35
Saturday12/11/201606:4616:34
Sunday13/11/201606:4816:32
Monday14/11/201606:4916:31
Tuesday15/11/201606:5116:30
Wednesday16/11/201606:5316:28
Thursday17/11/201606:5416:27
Friday18/11/201606:5616:26
Saturday19/11/201606:5716:25
Sunday20/11/201606:5916:24
Monday21/11/201607:0016:23
Tuesday22/11/201607:0216:22
Wednesday23/11/201607:0416:21
Thursday24/11/201607:0516:20
Friday25/11/201607:0616:19
Saturday26/11/201607:0816:18
Sunday27/11/201607:0916:18
Monday28/11/201607:1116:17
Tuesday29/11/201607:1216:16
Wednesday30/11/201607:1316:16
Thursday01/12/201607:1516:15
Friday02/12/201607:1616:14
Saturday03/12/201607:1716:14
Sunday04/12/201607:1916:14
Monday05/12/201607:2016:13
Tuesday06/12/201607:2116:13
Wednesday07/12/201607:2216:13
Thursday08/12/201607:2316:13
Friday09/12/201607:2416:12
Saturday10/12/201607:2516:12
Sunday11/12/201607:2616:12
Monday12/12/201607:2716:12
Tuesday13/12/201607:2816:12
Wednesday14/12/201607:2916:13
Thursday15/12/201607:3016:13
Friday16/12/201607:3016:13
Saturday17/12/201607:3116:13
Sunday18/12/201607:3216:14
Monday19/12/201607:3216:14
Tuesday20/12/201607:3316:14
Wednesday21/12/201607:3316:15
Thursday22/12/201607:3416:16
Friday23/12/201607:3416:16
Saturday24/12/201607:3416:17
Sunday25/12/201607:3516:18
Monday26/12/201607:3516:18
Tuesday27/12/201607:3516:19
Wednesday28/12/201607:3516:20
Thursday29/12/201607:3516:21
Friday30/12/201607:3516:22
Saturday31/12/201607:3516:23

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 2016
» CSV Data for 2016

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