Astronomical Almanac

April 1981

Month Year

Day	Sunrise/Sunset		Day Length		Astronomical Twilight		Nautical Twilight		Civil Twilight		Solar Noon
Day	Sunrise	Sunset	Length	Diff.	Start	End	Start	End	Start	End	Time	Mil. mi.
1 +	5:49 AM	6:38 PM	12:49:03	+3:24	4:00 AM	8:27 PM	4:39 AM	7:48 PM	5:16 AM	7:11 PM	12:15 PM (47.4°)	92.92

2 +	5:47 AM	6:39 PM	12:52:26	+3:23	3:58 AM	8:29 PM	4:37 AM	7:49 PM	5:14 AM	7:12 PM	12:15 PM (47.8°)	92.95

3 +	5:45 AM	6:41 PM	12:55:48	+3:22	3:56 AM	8:31 PM	4:35 AM	7:51 PM	5:12 AM	7:14 PM	12:15 PM (48.2°)	92.97

4 +	5:43 AM	6:42 PM	12:59:11	+3:23	3:53 AM	8:32 PM	4:33 AM	7:53 PM	5:10 AM	7:15 PM	12:15 PM (48.6°)	93.0

5 +	5:41 AM	6:44 PM	13:02:33	+3:22	3:51 AM	8:34 PM	4:31 AM	7:54 PM	5:08 AM	7:16 PM	12:15 PM (49.0°)	93.03

6 +	5:39 AM	6:45 PM	13:05:54	+3:21	3:48 AM	8:36 PM	4:29 AM	7:56 PM	5:06 AM	7:18 PM	12:10 PM (49.4°)	93.05

7 +	5:37 AM	6:46 PM	13:09:15	+3:21	3:46 AM	8:38 PM	4:26 AM	7:57 PM	5:04 AM	7:19 PM	12:10 PM (49.7°)	93.08

8 +	5:35 AM	6:48 PM	13:12:35	+3:20	3:44 AM	8:40 PM	4:24 AM	7:59 PM	5:02 AM	7:21 PM	12:10 PM (50.1°)	93.1

9 +	5:33 AM	6:49 PM	13:15:55	+3:20	3:41 AM	8:42 PM	4:22 AM	8:01 PM	5:00 AM	7:22 PM	12:10 PM (50.5°)	93.13

10 +	5:31 AM	6:51 PM	13:19:15	+3:20	3:39 AM	8:44 PM	4:20 AM	8:02 PM	4:58 AM	7:24 PM	12:10 PM (50.9°)	93.16

11 +	5:29 AM	6:52 PM	13:22:33	+3:18	3:36 AM	8:46 PM	4:18 AM	8:04 PM	4:56 AM	7:25 PM	12:10 PM (51.2°)	93.18

12 +	5:27 AM	6:53 PM	13:25:51	+3:18	3:34 AM	8:48 PM	4:15 AM	8:06 PM	4:54 AM	7:27 PM	12:10 PM (51.6°)	93.21

13 +	5:26 AM	6:55 PM	13:29:09	+3:18	3:31 AM	8:50 PM	4:13 AM	8:07 PM	4:52 AM	7:28 PM	12:10 PM (52.0°)	93.23

14 +	5:24 AM	6:56 PM	13:32:25	+3:16	3:29 AM	8:52 PM	4:11 AM	8:09 PM	4:50 AM	7:30 PM	12:10 PM (52.3°)	93.26

15 +	5:22 AM	6:58 PM	13:35:41	+3:16	3:26 AM	8:54 PM	4:09 AM	8:11 PM	4:48 AM	7:31 PM	12:10 PM (52.7°)	93.28

16 +	5:20 AM	6:59 PM	13:38:56	+3:15	3:24 AM	8:56 PM	4:07 AM	8:12 PM	4:46 AM	7:33 PM	12:10 PM (53.0°)	93.31

17 +	5:18 AM	7:00 PM	13:42:11	+3:15	3:21 AM	8:58 PM	4:05 AM	8:14 PM	4:44 AM	7:34 PM	12:10 PM (53.4°)	93.34

18 +	5:16 AM	7:02 PM	13:45:24	+3:13	3:19 AM	9:00 PM	4:02 AM	8:16 PM	4:42 AM	7:36 PM	12:10 PM (53.7°)	93.36

19 +	5:14 AM	7:03 PM	13:48:37	+3:13	3:16 AM	9:02 PM	4:00 AM	8:18 PM	4:40 AM	7:37 PM	12:10 PM (54.1°)	93.39

20 +	5:13 AM	7:04 PM	13:51:48	+3:11	3:14 AM	9:04 PM	3:58 AM	8:19 PM	4:38 AM	7:39 PM	12:10 PM (54.4°)	93.41

21 +	5:11 AM	7:06 PM	13:54:59	+3:11	3:11 AM	9:06 PM	3:56 AM	8:21 PM	4:36 AM	7:40 PM	12:10 PM (54.8°)	93.44

22 +	5:09 AM	7:07 PM	13:58:09	+3:10	3:09 AM	9:08 PM	3:54 AM	8:23 PM	4:35 AM	7:42 PM	12:10 PM (55.1°)	93.46

23 +	5:07 AM	7:09 PM	14:01:17	+3:08	3:06 AM	9:11 PM	3:52 AM	8:25 PM	4:33 AM	7:43 PM	12:10 PM (55.4°)	93.49

24 +	5:06 AM	7:10 PM	14:04:25	+3:08	3:04 AM	9:13 PM	3:50 AM	8:26 PM	4:31 AM	7:45 PM	12:10 PM (55.8°)	93.51

25 +	5:04 AM	7:11 PM	14:07:31	+3:06	3:01 AM	9:15 PM	3:48 AM	8:28 PM	4:29 AM	7:46 PM	12:10 PM (56.1°)	93.54

26 +	6:02 AM	8:13 PM	14:10:36	+3:05	3:59 AM	10:17 PM	4:45 AM	9:30 PM	5:27 AM	8:48 PM	1:08 PM (54.7°)	93.56

27 +	6:00 AM	8:14 PM	14:13:40	+3:04	3:56 AM	10:19 PM	4:43 AM	9:32 PM	5:25 AM	8:49 PM	1:05 PM (56.7°)	93.59

28 +	5:59 AM	8:15 PM	14:16:42	+3:02	3:54 AM	10:22 PM	4:41 AM	9:33 PM	5:23 AM	8:51 PM	1:05 PM (57.1°)	93.61

29 +	5:57 AM	8:17 PM	14:19:43	+3:01	3:51 AM	10:24 PM	4:39 AM	9:35 PM	5:22 AM	8:53 PM	1:05 PM (57.4°)	93.64

30 +	5:56 AM	8:18 PM	14:22:43	+3:00	3:49 AM	10:26 PM	4:37 AM	9:37 PM	5:20 AM	8:54 PM	1:05 PM (57.7°)	93.66

Day	Moonrise/Moonset			Meridian Passing
Day	Moonrise	Moonset	Moonrise	Time	Thou. mi.	Illumination
1 +	4:25 AM	2:59 PM	-	9:40 AM (28.8°)	228.07	9%

2 +	4:58 AM	4:15 PM	-	10:35 AM (33.3°)	224.76	4%

3 +	5:29 AM	5:33 PM	-	11:30 AM (38.6°)	222.18	1%

4 +	5:59 AM	6:52 PM	-	12:25 PM (44.2°)	220.56	0%

5 +	6:30 AM	8:13 PM	-	1:20 PM (49.7°)	220.05	2%

6 +	7:02 AM	9:33 PM	-	2:15 PM (54.6°)	220.67	5%

7 +	7:38 AM	10:50 PM	-	3:10 PM (58.7°)	222.31	11%

8 +	8:20 AM	-	-	4:10 PM (61.6°)	224.75	18%

9 +	-	12:02 AM	9:08 AM	5:05 PM (63.1°)	227.73	27%

10 +	-	1:06 AM	10:02 AM	6:05 PM (63.2°)	230.97	37%

11 +	-	2:01 AM	11:02 AM	6:55 PM (59.9°)	234.25	48%

12 +	-	2:46 AM	12:06 PM	7:50 PM (58.3°)	237.37	58%

13 +	-	3:24 AM	1:11 PM	8:35 PM (55.9°)	240.2	68%

14 +	-	3:55 AM	2:16 PM	9:25 PM (52.7°)	242.68	78%

15 +	-	4:23 AM	3:19 PM	10:05 PM (48.9°)	244.77	86%

16 +	-	4:47 AM	4:22 PM	10:50 PM (43.4°)	246.46	93%

17 +	-	5:11 AM	5:24 PM	12:00 AM (42.2°)	247.78	97%

18 +	-	5:34 AM	6:26 PM	12:00 AM (39.9°)	248.71	100%

19 +	-	5:57 AM	7:27 PM	12:15 AM (35.9°)	249.26	100%

20 +	-	6:22 AM	8:28 PM	12:55 AM (30.8°)	249.41	98%

21 +	-	6:50 AM	9:28 PM	1:40 AM (27.9°)	249.12	94%

22 +	-	7:22 AM	10:27 PM	2:25 AM (25.4°)	248.34	88%

23 +	-	7:58 AM	11:23 PM	3:15 AM (23.4°)	247.03	80%

24 +	-	8:41 AM	-	4:05 AM (22.2°)	245.15	71%

25 +	12:15 AM	9:31 AM	-	4:55 AM (20.9°)	242.7	61%

26 +	1:03 AM	11:27 AM	-	6:45 AM (22.6°)	239.85	50%

27 +	2:45 AM	12:30 PM	-	7:40 AM (24.1°)	236.44	40%

28 +	3:22 AM	1:38 PM	-	8:30 AM (27.2°)	232.75	30%

29 +	3:56 AM	2:49 PM	-	9:20 AM (31.3°)	229.01	21%

30 +	4:27 AM	4:04 PM	-	10:15 AM (36.1°)	225.48	13%