U41 Dubois Municipal night times
Dubois, ID
Night of Nov 6 to Nov 7MST
Position lights
§ 91.2095:12 PMto7:14 AM
Sunset to sunrise. Lights on.
0012Z to 1414Z
Night logging
§ 1.15:42 PMto6:43 AM
Civil twilight. Log it as night.
0042Z to 1343Z
Night currency
§ 61.57(b)6:12 PMto6:14 AM
One hour after sunset. Landings count.
0112Z to 1314Z
Evenings at U41
When each night begins, through the year. Local time.
| Date | SunsetLights on | Civil twilight endsLog night | 1 hr after sunsetLandings count |
|---|---|---|---|
| Nov 1MST | 5:18 PM | 5:49 PM | 6:18 PM |
| Nov 15MST | 5:02 PM | 5:33 PM | 6:02 PM |
| Dec 1MST | 4:51 PM | 5:24 PM | 5:51 PM |
| Dec 15MST | 4:51 PM | 5:24 PM | 5:51 PM |
| Jan 1MST | 5:01 PM | 5:34 PM | 6:01 PM |
| Jan 15MST | 5:16 PM | 5:48 PM | 6:16 PM |
| Feb 1MST | 5:39 PM | 6:10 PM | 6:39 PM |
| Feb 15MST | 5:58 PM | 6:28 PM | 6:58 PM |
| Mar 1MST | 6:17 PM | 6:46 PM | 7:17 PM |
| Mar 15MDT | 7:35 PM | 8:04 PM | 8:35 PM |
| Apr 1MDT | 7:56 PM | 8:25 PM | 8:56 PM |
| Apr 15MDT | 8:13 PM | 8:43 PM | 9:13 PM |
| May 1MDT | 8:32 PM | 9:04 PM | 9:32 PM |
| May 15MDT | 8:49 PM | 9:22 PM | 9:49 PM |
| Jun 1MDT | 9:05 PM | 9:41 PM | 10:05 PM |
| Jun 15MDT | 9:14 PM | 9:51 PM | 10:14 PM |
| Jul 1MDT | 9:16 PM | 9:52 PM | 10:16 PM |
| Jul 15MDT | 9:10 PM | 9:45 PM | 10:10 PM |
| Aug 1MDT | 8:53 PM | 9:26 PM | 9:53 PM |
| Aug 15MDT | 8:34 PM | 9:05 PM | 9:34 PM |
| Sep 1MDT | 8:05 PM | 8:35 PM | 9:05 PM |
| Sep 15MDT | 7:39 PM | 8:08 PM | 8:39 PM |
| Oct 1MDT | 7:10 PM | 7:39 PM | 8:10 PM |
| Oct 15MDT | 6:45 PM | 7:14 PM | 7:45 PM |
Mornings at U41
When each night ends. Local time.
| Date | 1 hr before sunriseLandings stop counting | Civil twilight beginsNight logging ends | SunriseLights off |
|---|---|---|---|
| Nov 1MST | 6:06 AM | 6:36 AM | 7:06 AM |
| Nov 15MST | 6:25 AM | 6:53 AM | 7:25 AM |
| Dec 1MST | 6:44 AM | 7:12 AM | 7:44 AM |
| Dec 15MST | 6:57 AM | 7:24 AM | 7:57 AM |
| Jan 1MST | 7:04 AM | 7:31 AM | 8:04 AM |
| Jan 15MST | 7:01 AM | 7:29 AM | 8:01 AM |
| Feb 1MST | 6:47 AM | 7:16 AM | 7:47 AM |
| Feb 15MST | 6:28 AM | 6:59 AM | 7:28 AM |
| Mar 1MST | 6:06 AM | 6:37 AM | 7:06 AM |
| Mar 15MDT | 6:41 AM | 7:13 AM | 7:41 AM |
| Apr 1MDT | 6:10 AM | 6:41 AM | 7:10 AM |
| Apr 15MDT | 5:46 AM | 6:15 AM | 6:46 AM |
| May 1MDT | 5:20 AM | 5:49 AM | 6:20 AM |
| May 15MDT | 5:02 AM | 5:29 AM | 6:02 AM |
| Jun 1MDT | 4:49 AM | 5:13 AM | 5:49 AM |
| Jun 15MDT | 4:45 AM | 5:08 AM | 5:45 AM |
| Jul 1MDT | 4:49 AM | 5:13 AM | 5:49 AM |
| Jul 15MDT | 4:59 AM | 5:24 AM | 5:59 AM |
| Aug 1MDT | 5:17 AM | 5:43 AM | 6:17 AM |
| Aug 15MDT | 5:32 AM | 6:01 AM | 6:32 AM |
| Sep 1MDT | 5:52 AM | 6:22 AM | 6:52 AM |
| Sep 15MDT | 6:08 AM | 6:39 AM | 7:08 AM |
| Oct 1MDT | 6:27 AM | 6:58 AM | 7:27 AM |
| Oct 15MDT | 6:44 AM | 7:14 AM | 7:44 AM |
Lights and runways
As the FAA lists them. NOTAMs aren't included, so check current NOTAMs before you fly.
Runway 16/34
4,600 × 100 ft · Gravel
Frequencies
Night at U41, in short
When can I log night time at U41?
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 5:42 PM to 6:43 AM MST.
When do landings at U41 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 6:12 PM to 6:14 AM MST.
When are position lights required at U41?
From sunset to sunrise (14 CFR 91.209(a)). On the night of Nov 6, 2026, that was 5:12 PM to 7:14 AM MST.
Nearby airports
- 1U2 Mud Lake/West Jefferson County Mud Lake, ID · 22 nm
- U12 Stanford Field St Anthony, ID · 26 nm
- KRXE Rexburg-Madison County Rexburg, ID · 27 nm
- U56 Rigby Rigby, ID · 34 nm
- KIDA Idaho Falls Regional Idaho Falls, ID · 39 nm
- 4U9 Hyak Airbase Dell, MT · 41 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.