Boulder, CO: Sunrise, Sunset, Moonrise, Moonset, Twilight

Calculated for March 2023

Tabular summary: Time of Sunrise, sunset, moonrise, moonset, daylight hours, twilight for Boulder, CO - all times are local times no DST is calculated
	Sun				Moon		Twilight
Day	Rise	Set	Transit	Daylight	Rise	Set	Morning	Evening
Wed Mar 1	06:35	17:53	12:13	11:18 hrs.	12:15	03:26	05:36	18:51
Thu Mar 2	06:33	17:54	12:13	11:21 hrs.	13:10	04:15	05:34	18:52
Fri Mar 3	06:32	17:55	12:13	11:23 hrs.	14:10	04:57	05:33	18:53
Sat Mar 4	06:30	17:56	12:13	11:26 hrs.	15:13	05:32	05:31	18:54
Sun Mar 5	06:28	17:57	12:12	11:29 hrs.	16:15	06:01	05:30	18:56
Mon Mar 6	06:27	17:58	12:12	11:31 hrs.	17:18	06:26	05:28	18:57
Tue Mar 7	06:25	17:59	12:12	11:34 hrs.	18:19	06:49	05:27	18:58
Wed Mar 8	06:24	18:00	12:12	11:36 hrs.	19:21	07:10	05:25	18:59
Thu Mar 9	06:22	18:01	12:11	11:39 hrs.	20:24	07:31	05:24	19:00
Fri Mar 10	06:21	18:02	12:11	11:42 hrs.	21:29	07:53	05:22	19:01
Sat Mar 11	06:19	18:03	12:11	11:44 hrs.	22:36	08:17	05:21	19:02
Sun Mar 12	06:17	18:04	12:11	11:47 hrs.	23:46	08:45	05:19	19:03
Mon Mar 13	06:16	18:06	12:10	11:50 hrs.	00:59	09:20	05:17	19:04
Tue Mar 14	06:14	18:07	12:10	11:52 hrs.	00:59	10:03	05:16	19:05
Wed Mar 15	06:13	18:08	12:10	11:55 hrs.	02:07	10:57	05:14	19:06
Thu Mar 16	06:11	18:09	12:10	11:58 hrs.	03:10	12:03	05:13	19:07
Fri Mar 17	06:09	18:10	12:09	12:00 hrs.	04:02	13:17	05:11	19:08
Sat Mar 18	06:08	18:11	12:09	12:03 hrs.	04:46	14:37	05:09	19:10
Sun Mar 19	06:06	18:12	12:09	12:06 hrs.	05:21	15:56	05:08	19:11
Mon Mar 20	06:05	18:13	12:08	12:08 hrs.	05:51	17:13	05:06	19:12
Tue Mar 21	06:03	18:14	12:08	12:11 hrs.	06:17	18:28	05:04	19:13
Wed Mar 22	06:01	18:15	12:08	12:14 hrs.	06:42	19:41	05:03	19:14
Thu Mar 23	06:00	18:16	12:08	12:16 hrs.	07:08	20:53	05:01	19:15
Fri Mar 24	05:58	18:17	12:07	12:19 hrs.	07:34	22:04	04:59	19:16
Sat Mar 25	05:56	18:18	12:07	12:22 hrs.	08:04	23:13	04:57	19:17
Sun Mar 26	05:55	18:19	12:07	12:24 hrs.	08:39	00:20	04:56	19:18
Mon Mar 27	05:53	18:20	12:06	12:27 hrs.	09:20	01:21	04:54	19:19
Tue Mar 28	05:52	18:21	12:06	12:30 hrs.	10:07	01:17	04:52	19:21
Wed Mar 29	05:50	18:22	12:06	12:32 hrs.	11:01	02:10	04:51	19:22
Thu Mar 30	05:48	18:23	12:05	12:35 hrs.	12:00	02:55	04:49	19:23
Sat Apr 1	05:45	18:25	12:05	12:40 hrs.	14:04	04:03	04:45	19:25

Annotation:

The calculated time for sunrise, sunset, moonrise, is accurate to + - 1 minute. The actual times depend on unpredictable atmospheric conditions that affect the amount of refraction at the horizon. Local topography (e.g., mountains on the horizon) and the height of the observer can affect the times of rise or set even more.

The times of dawn and dusk relate to the beginning of the so-called "nautical twilight" (ie when the sun is 12 degrees below the horizon). All calculations are for sea level.

Calculation of sunset and sunrise times for cities apart of the list of predefined cities are dependent on the exact latitude and longitude coordinates and the time zone you entered.

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