S71 Edgar G Obie night times
Chinook, MT
Night of Nov 6 to Nov 7MST
Position lights
§ 91.2094:49 PMto7:13 AM
Sunset to sunrise. Lights on.
2349Z to 1413Z
Night logging
§ 1.15:23 PMto6:40 AM
Civil twilight. Log it as night.
0023Z to 1340Z
Night currency
§ 61.57(b)5:49 PMto6:13 AM
One hour after sunset. Landings count.
0049Z to 1313Z
Evenings at S71
When each night begins, through the year. Local time.
| Date | SunsetLights on | Civil twilight endsLog night | 1 hr after sunsetLandings count |
|---|---|---|---|
| Nov 1MST | 4:57 PM | 5:30 PM | 5:57 PM |
| Nov 15MST | 4:37 PM | 5:12 PM | 5:37 PM |
| Dec 1MST | 4:24 PM | 5:00 PM | 5:24 PM |
| Dec 15MST | 4:22 PM | 4:59 PM | 5:22 PM |
| Jan 1MST | 4:32 PM | 5:09 PM | 5:32 PM |
| Jan 15MST | 4:49 PM | 5:25 PM | 5:49 PM |
| Feb 1MST | 5:15 PM | 5:49 PM | 6:15 PM |
| Feb 15MST | 5:38 PM | 6:11 PM | 6:38 PM |
| Mar 1MST | 6:01 PM | 6:32 PM | 7:01 PM |
| Mar 15MDT | 7:22 PM | 7:54 PM | 8:22 PM |
| Apr 1MDT | 7:48 PM | 8:20 PM | 8:48 PM |
| Apr 15MDT | 8:08 PM | 8:41 PM | 9:08 PM |
| May 1MDT | 8:32 PM | 9:07 PM | 9:32 PM |
| May 15MDT | 8:51 PM | 9:29 PM | 9:51 PM |
| Jun 1MDT | 9:11 PM | 9:52 PM | 10:11 PM |
| Jun 15MDT | 9:21 PM | 10:03 PM | 10:21 PM |
| Jul 1MDT | 9:23 PM | 10:04 PM | 10:23 PM |
| Jul 15MDT | 9:15 PM | 9:55 PM | 10:15 PM |
| Aug 1MDT | 8:55 PM | 9:32 PM | 9:55 PM |
| Aug 15MDT | 8:32 PM | 9:06 PM | 9:32 PM |
| Sep 1MDT | 7:59 PM | 8:31 PM | 8:59 PM |
| Sep 15MDT | 7:30 PM | 8:01 PM | 8:30 PM |
| Oct 1MDT | 6:56 PM | 7:27 PM | 7:56 PM |
| Oct 15MDT | 6:28 PM | 6:59 PM | 7:28 PM |
Mornings at S71
When each night ends. Local time.
| Date | 1 hr before sunriseLandings stop counting | Civil twilight beginsNight logging ends | SunriseLights off |
|---|---|---|---|
| Nov 1MST | 6:04 AM | 6:31 AM | 7:04 AM |
| Nov 15MST | 6:26 AM | 6:51 AM | 7:26 AM |
| Dec 1MST | 6:48 AM | 7:12 AM | 7:48 AM |
| Dec 15MST | 7:03 AM | 7:26 AM | 8:03 AM |
| Jan 1MST | 7:09 AM | 7:33 AM | 8:09 AM |
| Jan 15MST | 7:04 AM | 7:29 AM | 8:04 AM |
| Feb 1MST | 6:46 AM | 7:13 AM | 7:46 AM |
| Feb 15MST | 6:25 AM | 6:52 AM | 7:25 AM |
| Mar 1MST | 5:59 AM | 6:27 AM | 6:59 AM |
| Mar 15MDT | 6:30 AM | 6:59 AM | 7:30 AM |
| Apr 1MDT | 5:55 AM | 6:23 AM | 6:55 AM |
| Apr 15MDT | 5:27 AM | 5:54 AM | 6:27 AM |
| May 1MDT | 4:57 AM | 5:22 AM | 5:57 AM |
| May 15MDT | 4:36 AM | 4:59 AM | 5:36 AM |
| Jun 1MDT | 4:19 AM | 4:39 AM | 5:19 AM |
| Jun 15MDT | 4:14 AM | 4:32 AM | 5:14 AM |
| Jul 1MDT | 4:19 AM | 4:37 AM | 5:19 AM |
| Jul 15MDT | 4:31 AM | 4:51 AM | 5:31 AM |
| Aug 1MDT | 4:51 AM | 5:14 AM | 5:51 AM |
| Aug 15MDT | 5:10 AM | 5:36 AM | 6:10 AM |
| Sep 1MDT | 5:34 AM | 6:01 AM | 6:34 AM |
| Sep 15MDT | 5:54 AM | 6:22 AM | 6:54 AM |
| Oct 1MDT | 6:16 AM | 6:45 AM | 7:16 AM |
| Oct 15MDT | 6:37 AM | 7:05 AM | 7:37 AM |
Lights and runways
As the FAA lists them. NOTAMs aren't included, so check current NOTAMs before you fly.
ACTVT PAPI RWY 26; MIRL RWY 08/26 DAWN-DUSK - CTAF. AFTER DUSK MIRL ON CONSLY TIL DAWN.
Runway 08/26
4,000 × 75 ft · Asphalt
Frequencies
Night at S71, in short
When can I log night time at S71?
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 5:23 PM to 6:40 AM MST.
When do landings at S71 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 5:49 PM to 6:13 AM MST.
When are position lights required at S71?
From sunset to sunrise (14 CFR 91.209(a)). On the night of Nov 6, 2026, that was 4:49 PM to 7:13 AM MST.
Nearby airports
- 48S Harlem Harlem, MT · 19 nm
- KHVR Havre City-County Havre, MT · 21 nm
- 6U6 Hogeland Hogeland, MT · 28 nm
- 9U0 Turner Turner, MT · 37 nm
- CW0 Cow Creek Winifred, MT · 40 nm
- 3U8 Big Sandy Big Sandy, MT · 43 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.