U37 Midway night times
Atomic City, ID
Night of Nov 6 to Nov 7MST
Position lights
§ 91.2095:16 PMto7:15 AM
Sunset to sunrise. Lights on.
0016Z to 1415Z
Night logging
§ 1.15:46 PMto6:44 AM
Civil twilight. Log it as night.
0046Z to 1344Z
Night currency
§ 61.57(b)6:16 PMto6:15 AM
One hour after sunset. Landings count.
0116Z to 1315Z
Evenings at U37
When each night begins, through the year. Local time.
| Date | SunsetLights on | Civil twilight endsLog night | 1 hr after sunsetLandings count |
|---|---|---|---|
| Nov 1MST | 5:22 PM | 5:52 PM | 6:22 PM |
| Nov 15MST | 5:06 PM | 5:37 PM | 6:06 PM |
| Dec 1MST | 4:56 PM | 5:28 PM | 5:56 PM |
| Dec 15MST | 4:56 PM | 5:28 PM | 5:56 PM |
| Jan 1MST | 5:06 PM | 5:38 PM | 6:06 PM |
| Jan 15MST | 5:21 PM | 5:52 PM | 6:21 PM |
| Feb 1MST | 5:43 PM | 6:13 PM | 6:43 PM |
| Feb 15MST | 6:02 PM | 6:31 PM | 7:02 PM |
| Mar 1MST | 6:20 PM | 6:49 PM | 7:20 PM |
| Mar 15MDT | 7:37 PM | 8:06 PM | 8:37 PM |
| Apr 1MDT | 7:58 PM | 8:27 PM | 8:58 PM |
| Apr 15MDT | 8:14 PM | 8:44 PM | 9:14 PM |
| May 1MDT | 8:33 PM | 9:05 PM | 9:33 PM |
| May 15MDT | 8:49 PM | 9:22 PM | 9:49 PM |
| Jun 1MDT | 9:05 PM | 9:40 PM | 10:05 PM |
| Jun 15MDT | 9:14 PM | 9:50 PM | 10:14 PM |
| Jul 1MDT | 9:16 PM | 9:51 PM | 10:16 PM |
| Jul 15MDT | 9:10 PM | 9:44 PM | 10:10 PM |
| Aug 1MDT | 8:54 PM | 9:26 PM | 9:54 PM |
| Aug 15MDT | 8:34 PM | 9:05 PM | 9:34 PM |
| Sep 1MDT | 8:07 PM | 8:36 PM | 9:07 PM |
| Sep 15MDT | 7:41 PM | 8:10 PM | 8:41 PM |
| Oct 1MDT | 7:12 PM | 7:41 PM | 8:12 PM |
| Oct 15MDT | 6:48 PM | 7:17 PM | 7:48 PM |
Mornings at U37
When each night ends. Local time.
| Date | 1 hr before sunriseLandings stop counting | Civil twilight beginsNight logging ends | SunriseLights off |
|---|---|---|---|
| Nov 1MST | 6:07 AM | 6:37 AM | 7:07 AM |
| Nov 15MST | 6:25 AM | 6:54 AM | 7:25 AM |
| Dec 1MST | 6:44 AM | 7:12 AM | 7:44 AM |
| Dec 15MST | 6:57 AM | 7:25 AM | 7:57 AM |
| Jan 1MST | 7:04 AM | 7:32 AM | 8:04 AM |
| Jan 15MST | 7:01 AM | 7:29 AM | 8:01 AM |
| Feb 1MST | 6:47 AM | 7:17 AM | 7:47 AM |
| Feb 15MST | 6:30 AM | 7:00 AM | 7:30 AM |
| Mar 1MST | 6:08 AM | 6:39 AM | 7:08 AM |
| Mar 15MDT | 6:44 AM | 7:15 AM | 7:44 AM |
| Apr 1MDT | 6:13 AM | 6:44 AM | 7:13 AM |
| Apr 15MDT | 5:49 AM | 6:19 AM | 6:49 AM |
| May 1MDT | 5:24 AM | 5:53 AM | 6:24 AM |
| May 15MDT | 5:07 AM | 5:34 AM | 6:07 AM |
| Jun 1MDT | 4:53 AM | 5:19 AM | 5:53 AM |
| Jun 15MDT | 4:50 AM | 5:14 AM | 5:50 AM |
| Jul 1MDT | 4:54 AM | 5:19 AM | 5:54 AM |
| Jul 15MDT | 5:04 AM | 5:30 AM | 6:04 AM |
| Aug 1MDT | 5:21 AM | 5:48 AM | 6:21 AM |
| Aug 15MDT | 5:36 AM | 6:05 AM | 6:36 AM |
| Sep 1MDT | 5:55 AM | 6:26 AM | 6:55 AM |
| Sep 15MDT | 6:11 AM | 6:42 AM | 7:11 AM |
| Oct 1MDT | 6:29 AM | 7:00 AM | 7:29 AM |
| Oct 15MDT | 6:45 AM | 7:16 AM | 7:45 AM |
Lights and runways
As the FAA lists them. NOTAMs aren't included, so check current NOTAMs before you fly.
Runway 02/20
3,800 × 175 ft · GRAVEL
Frequencies
Night at U37, in short
When can I log night time at U37?
From the end of evening civil twilight to the beginning of morning civil twilight, when the sun is 6° below the horizon (14 CFR 1.1). On the night of Nov 6, 2026, that was 5:46 PM to 6:44 AM MST.
When do landings at U37 count for night currency?
From one hour after sunset to one hour before sunrise. To carry passengers at night you need 3 takeoffs and 3 full-stop landings in that period within the last 90 days (14 CFR 61.57(b)). On the night of Nov 6, 2026, that was 6:16 PM to 6:15 AM MST.
When are position lights required at U37?
From sunset to sunrise (14 CFR 91.209(a)). On the night of Nov 6, 2026, that was 5:16 PM to 7:15 AM MST.
Nearby airports
- U46 Big Southern Butte Atomic City, ID · 11 nm
- 2U4 Rockford Municipal Rockford, ID · 20 nm
- U48 Coxs Well Atomic City, ID · 23 nm
- KAOC Arco-Butte County Arco, ID · 25 nm
- U02 Mccarley Field Blackfoot, ID · 25 nm
- U97 Howe Howe, ID · 25 nm
Times are worked out from the sun's position for a sea-level horizon, rounded to the minute. Airport data from the FAA NASR cycle of Oct 29, 2026.