31D Inter County night times
Irwin, PA
Night of Nov 6 to Nov 7EST
Position lights
§ 91.2095:10 PMto6:56 AM
Sunset to sunrise. Lights on.
2210Z to 1156Z
Night logging
§ 1.15:39 PMto6:27 AM
Civil twilight. Log it as night.
2239Z to 1127Z
Night currency
§ 61.57(b)6:10 PMto5:56 AM
One hour after sunset. Landings count.
2310Z to 1056Z
Evenings at 31D
When each night begins, through the year. Local time.
| Date | SunsetLights on | Civil twilight endsLog night | 1 hr after sunsetLandings count |
|---|---|---|---|
| Nov 1EST | 5:16 PM | 5:44 PM | 6:16 PM |
| Nov 15EST | 5:02 PM | 5:31 PM | 6:02 PM |
| Dec 1EST | 4:53 PM | 5:24 PM | 5:53 PM |
| Dec 15EST | 4:54 PM | 5:24 PM | 5:54 PM |
| Jan 1EST | 5:03 PM | 5:34 PM | 6:03 PM |
| Jan 15EST | 5:17 PM | 5:47 PM | 6:17 PM |
| Feb 1EST | 5:37 PM | 6:06 PM | 6:37 PM |
| Feb 15EST | 5:54 PM | 6:22 PM | 6:54 PM |
| Mar 1EST | 6:11 PM | 6:38 PM | 7:11 PM |
| Mar 15EDT | 7:26 PM | 7:53 PM | 8:26 PM |
| Apr 1EDT | 7:43 PM | 8:11 PM | 8:43 PM |
| Apr 15EDT | 7:58 PM | 8:26 PM | 8:58 PM |
| May 1EDT | 8:14 PM | 8:44 PM | 9:14 PM |
| May 15EDT | 8:28 PM | 8:59 PM | 9:28 PM |
| Jun 1EDT | 8:43 PM | 9:15 PM | 9:43 PM |
| Jun 15EDT | 8:51 PM | 9:24 PM | 9:51 PM |
| Jul 1EDT | 8:53 PM | 9:26 PM | 9:53 PM |
| Jul 15EDT | 8:48 PM | 9:20 PM | 9:48 PM |
| Aug 1EDT | 8:34 PM | 9:04 PM | 9:34 PM |
| Aug 15EDT | 8:17 PM | 8:46 PM | 9:17 PM |
| Sep 1EDT | 7:51 PM | 8:19 PM | 8:51 PM |
| Sep 15EDT | 7:28 PM | 7:55 PM | 8:28 PM |
| Oct 1EDT | 7:02 PM | 7:29 PM | 8:02 PM |
| Oct 15EDT | 6:39 PM | 7:07 PM | 7:39 PM |
Mornings at 31D
When each night ends. Local time.
| Date | 1 hr before sunriseLandings stop counting | Civil twilight beginsNight logging ends | SunriseLights off |
|---|---|---|---|
| Nov 1EST | 5:49 AM | 6:21 AM | 6:49 AM |
| Nov 15EST | 6:05 AM | 6:36 AM | 7:05 AM |
| Dec 1EST | 6:23 AM | 6:53 AM | 7:23 AM |
| Dec 15EST | 6:35 AM | 7:04 AM | 7:35 AM |
| Jan 1EST | 6:42 AM | 7:11 AM | 7:42 AM |
| Jan 15EST | 6:40 AM | 7:10 AM | 7:40 AM |
| Feb 1EST | 6:28 AM | 7:00 AM | 7:28 AM |
| Feb 15EST | 6:13 AM | 6:45 AM | 7:13 AM |
| Mar 1EST | 5:53 AM | 6:26 AM | 6:53 AM |
| Mar 15EDT | 6:31 AM | 7:04 AM | 7:31 AM |
| Apr 1EDT | 6:03 AM | 6:36 AM | 7:03 AM |
| Apr 15EDT | 5:41 AM | 6:13 AM | 6:41 AM |
| May 1EDT | 5:19 AM | 5:49 AM | 6:19 AM |
| May 15EDT | 5:03 AM | 5:32 AM | 6:03 AM |
| Jun 1EDT | 4:51 AM | 5:19 AM | 5:51 AM |
| Jun 15EDT | 4:49 AM | 5:16 AM | 5:49 AM |
| Jul 1EDT | 4:53 AM | 5:20 AM | 5:53 AM |
| Jul 15EDT | 5:02 AM | 5:30 AM | 6:02 AM |
| Aug 1EDT | 5:17 AM | 5:46 AM | 6:17 AM |
| Aug 15EDT | 5:30 AM | 6:01 AM | 6:30 AM |
| Sep 1EDT | 5:46 AM | 6:18 AM | 6:46 AM |
| Sep 15EDT | 6:00 AM | 6:32 AM | 7:00 AM |
| Oct 1EDT | 6:15 AM | 6:48 AM | 7:15 AM |
| Oct 15EDT | 6:30 AM | 7:02 AM | 7:30 AM |
Lights and runways
As the FAA lists them. NOTAMs aren't included, so check current NOTAMs before you fly.
Runway E/W
1,800 × 120 ft · Turf
Frequencies
Night at 31D, in short
When can I log night time at 31D?
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 5:39 PM to 6:27 AM EST.
When do landings at 31D 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 6:10 PM to 5:56 AM EST.
When are position lights required at 31D?
From sunset to sunrise (14 CFR 91.209(a)). On the night of Nov 6, 2026, that was 5:10 PM to 6:56 AM EST.
Nearby airports
- KAGC Allegheny County Pittsburgh, PA · 7 nm
- KFWQ Rostraver Monongahela, PA · 8 nm
- 5G8 Greensburg Jeannette Regional Jeannette, PA · 8 nm
- G05 Finleyville Airpark Finleyville, PA · 12 nm
- P99 W P H S Mount Pleasant, PA · 17 nm
- KLBE Arnold Palmer Regional Latrobe, PA · 17 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.