5U1 Dutton night times
Dutton, MT
Night of Nov 6 to Nov 7MST
Position lights
§ 91.2095:01 PMto7:21 AM
Sunset to sunrise. Lights on.
0001Z to 1421Z
Night logging
§ 1.15:34 PMto6:48 AM
Civil twilight. Log it as night.
0034Z to 1348Z
Night currency
§ 61.57(b)6:01 PMto6:21 AM
One hour after sunset. Landings count.
0101Z to 1321Z
Evenings at 5U1
When each night begins, through the year. Local time.
| Date | SunsetLights on | Civil twilight endsLog night | 1 hr after sunsetLandings count |
|---|---|---|---|
| Nov 1MST | 5:08 PM | 5:41 PM | 6:08 PM |
| Nov 15MST | 4:49 PM | 5:23 PM | 5:49 PM |
| Dec 1MST | 4:36 PM | 5:12 PM | 5:36 PM |
| Dec 15MST | 4:35 PM | 5:11 PM | 5:35 PM |
| Jan 1MST | 4:45 PM | 5:21 PM | 5:45 PM |
| Jan 15MST | 5:02 PM | 5:37 PM | 6:02 PM |
| Feb 1MST | 5:27 PM | 6:00 PM | 6:27 PM |
| Feb 15MST | 5:50 PM | 6:21 PM | 6:50 PM |
| Mar 1MST | 6:11 PM | 6:42 PM | 7:11 PM |
| Mar 15MDT | 7:32 PM | 8:03 PM | 8:32 PM |
| Apr 1MDT | 7:57 PM | 8:28 PM | 8:57 PM |
| Apr 15MDT | 8:17 PM | 8:49 PM | 9:17 PM |
| May 1MDT | 8:40 PM | 9:14 PM | 9:40 PM |
| May 15MDT | 8:58 PM | 9:35 PM | 9:58 PM |
| Jun 1MDT | 9:18 PM | 9:57 PM | 10:18 PM |
| Jun 15MDT | 9:27 PM | 10:08 PM | 10:27 PM |
| Jul 1MDT | 9:29 PM | 10:10 PM | 10:29 PM |
| Jul 15MDT | 9:21 PM | 10:00 PM | 10:21 PM |
| Aug 1MDT | 9:02 PM | 9:38 PM | 10:02 PM |
| Aug 15MDT | 8:40 PM | 9:14 PM | 9:40 PM |
| Sep 1MDT | 8:08 PM | 8:40 PM | 9:08 PM |
| Sep 15MDT | 7:39 PM | 8:10 PM | 8:39 PM |
| Oct 1MDT | 7:06 PM | 7:37 PM | 8:06 PM |
| Oct 15MDT | 6:39 PM | 7:10 PM | 7:39 PM |
Mornings at 5U1
When each night ends. Local time.
| Date | 1 hr before sunriseLandings stop counting | Civil twilight beginsNight logging ends | SunriseLights off |
|---|---|---|---|
| Nov 1MST | 6:12 AM | 6:39 AM | 7:12 AM |
| Nov 15MST | 6:33 AM | 6:59 AM | 7:33 AM |
| Dec 1MST | 6:55 AM | 7:20 AM | 7:55 AM |
| Dec 15MST | 7:09 AM | 7:33 AM | 8:09 AM |
| Jan 1MST | 7:16 AM | 7:40 AM | 8:16 AM |
| Jan 15MST | 7:11 AM | 7:36 AM | 8:11 AM |
| Feb 1MST | 6:54 AM | 7:21 AM | 7:54 AM |
| Feb 15MST | 6:33 AM | 7:01 AM | 7:33 AM |
| Mar 1MST | 6:08 AM | 6:37 AM | 7:08 AM |
| Mar 15MDT | 6:40 AM | 7:09 AM | 7:40 AM |
| Apr 1MDT | 6:05 AM | 6:34 AM | 7:05 AM |
| Apr 15MDT | 5:38 AM | 6:05 AM | 6:38 AM |
| May 1MDT | 5:09 AM | 5:35 AM | 6:09 AM |
| May 15MDT | 4:49 AM | 5:12 AM | 5:49 AM |
| Jun 1MDT | 4:32 AM | 4:53 AM | 5:32 AM |
| Jun 15MDT | 4:27 AM | 4:46 AM | 5:27 AM |
| Jul 1MDT | 4:32 AM | 4:51 AM | 5:32 AM |
| Jul 15MDT | 4:44 AM | 5:04 AM | 5:44 AM |
| Aug 1MDT | 5:03 AM | 5:27 AM | 6:03 AM |
| Aug 15MDT | 5:22 AM | 5:48 AM | 6:22 AM |
| Sep 1MDT | 5:45 AM | 6:13 AM | 6:45 AM |
| Sep 15MDT | 6:04 AM | 6:33 AM | 7:04 AM |
| Oct 1MDT | 6:26 AM | 6:55 AM | 7:26 AM |
| Oct 15MDT | 6:46 AM | 7:15 AM | 7:46 AM |
Lights and runways
As the FAA lists them. NOTAMs aren't included, so check current NOTAMs before you fly.
Runway 16/34
3,130 × 115 ft · Asphalt
NSTD; RWY EDGE LGTS 55 FT W & 70 FT E OF CNTRLN. DUSK-DAWN: 2750 FT OF RWY LGTD.
Frequencies
Night at 5U1, in short
When can I log night time at 5U1?
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 5:34 PM to 6:48 AM MST.
When do landings at 5U1 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 6:01 PM to 6:21 AM MST.
When are position lights required at 5U1?
From sunset to sunrise (14 CFR 91.209(a)). On the night of Nov 6, 2026, that was 5:01 PM to 7:21 AM MST.
Nearby airports
- 5U5 Fairfield Fairfield, MT · 17 nm
- KCII Choteau Choteau, MT · 19 nm
- S01 Conrad Conrad, MT · 22 nm
- KGTF Great Falls International Great Falls, MT · 26 nm
- 7S7 Valier Valier, MT · 35 nm
- 3U5 Augusta Augusta, MT · 36 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.