H37 Herlong night times
Herlong, CA
Night of Nov 6 to Nov 7PST
Position lights
§ 91.2094:52 PMto6:37 AM
Sunset to sunrise. Lights on.
0052Z to 1437Z
Night logging
§ 1.15:21 PMto6:09 AM
Civil twilight. Log it as night.
0121Z to 1409Z
Night currency
§ 61.57(b)5:52 PMto5:37 AM
One hour after sunset. Landings count.
0152Z to 1337Z
Evenings at H37
When each night begins, through the year. Local time.
| Date | SunsetLights on | Civil twilight endsLog night | 1 hr after sunsetLandings count |
|---|---|---|---|
| Nov 1PST | 4:58 PM | 5:26 PM | 5:58 PM |
| Nov 15PST | 4:44 PM | 5:13 PM | 5:44 PM |
| Dec 1PST | 4:36 PM | 5:06 PM | 5:36 PM |
| Dec 15PST | 4:36 PM | 5:07 PM | 5:36 PM |
| Jan 1PST | 4:46 PM | 5:16 PM | 5:46 PM |
| Jan 15PST | 5:00 PM | 5:29 PM | 6:00 PM |
| Feb 1PST | 5:20 PM | 5:48 PM | 6:20 PM |
| Feb 15PST | 5:36 PM | 6:04 PM | 6:36 PM |
| Mar 1PST | 5:52 PM | 6:20 PM | 6:52 PM |
| Mar 15PDT | 7:08 PM | 7:35 PM | 8:08 PM |
| Apr 1PDT | 7:25 PM | 7:52 PM | 8:25 PM |
| Apr 15PDT | 7:39 PM | 8:08 PM | 8:39 PM |
| May 1PDT | 7:56 PM | 8:25 PM | 8:56 PM |
| May 15PDT | 8:10 PM | 8:40 PM | 9:10 PM |
| Jun 1PDT | 8:24 PM | 8:56 PM | 9:24 PM |
| Jun 15PDT | 8:32 PM | 9:05 PM | 9:32 PM |
| Jul 1PDT | 8:34 PM | 9:07 PM | 9:34 PM |
| Jul 15PDT | 8:29 PM | 9:01 PM | 9:29 PM |
| Aug 1PDT | 8:15 PM | 8:45 PM | 9:15 PM |
| Aug 15PDT | 7:58 PM | 8:27 PM | 8:58 PM |
| Sep 1PDT | 7:32 PM | 8:00 PM | 8:32 PM |
| Sep 15PDT | 7:10 PM | 7:37 PM | 8:10 PM |
| Oct 1PDT | 6:43 PM | 7:10 PM | 7:43 PM |
| Oct 15PDT | 6:21 PM | 6:48 PM | 7:21 PM |
Mornings at H37
When each night ends. Local time.
| Date | 1 hr before sunriseLandings stop counting | Civil twilight beginsNight logging ends | SunriseLights off |
|---|---|---|---|
| Nov 1PST | 5:30 AM | 6:02 AM | 6:30 AM |
| Nov 15PST | 5:46 AM | 6:17 AM | 6:46 AM |
| Dec 1PST | 6:04 AM | 6:34 AM | 7:04 AM |
| Dec 15PST | 6:16 AM | 6:45 AM | 7:16 AM |
| Jan 1PST | 6:23 AM | 6:53 AM | 7:23 AM |
| Jan 15PST | 6:21 AM | 6:51 AM | 7:21 AM |
| Feb 1PST | 6:10 AM | 6:41 AM | 7:10 AM |
| Feb 15PST | 5:54 AM | 6:26 AM | 6:54 AM |
| Mar 1PST | 5:34 AM | 6:07 AM | 6:34 AM |
| Mar 15PDT | 6:12 AM | 6:45 AM | 7:12 AM |
| Apr 1PDT | 5:45 AM | 6:17 AM | 6:45 AM |
| Apr 15PDT | 5:23 AM | 5:55 AM | 6:23 AM |
| May 1PDT | 5:01 AM | 5:31 AM | 6:01 AM |
| May 15PDT | 4:45 AM | 5:14 AM | 5:45 AM |
| Jun 1PDT | 4:34 AM | 5:01 AM | 5:34 AM |
| Jun 15PDT | 4:31 AM | 4:58 AM | 5:31 AM |
| Jul 1PDT | 4:35 AM | 5:02 AM | 5:35 AM |
| Jul 15PDT | 4:44 AM | 5:12 AM | 5:44 AM |
| Aug 1PDT | 4:59 AM | 5:28 AM | 5:59 AM |
| Aug 15PDT | 5:12 AM | 5:43 AM | 6:12 AM |
| Sep 1PDT | 5:28 AM | 6:00 AM | 6:28 AM |
| Sep 15PDT | 5:42 AM | 6:14 AM | 6:42 AM |
| Oct 1PDT | 5:57 AM | 6:30 AM | 6:57 AM |
| Oct 15PDT | 6:11 AM | 6:44 AM | 7:11 AM |
Lights and runways
As the FAA lists them. NOTAMs aren't included, so check current NOTAMs before you fly.
Runway 06/24
3,260 × 40 ft · Asphalt
Frequencies
Night at H37, in short
When can I log night time at H37?
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 5:21 PM to 6:09 AM PST.
When do landings at H37 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 5:52 PM to 5:37 AM PST.
When are position lights required at H37?
From sunset to sunrise (14 CFR 91.209(a)). On the night of Nov 6, 2026, that was 4:52 PM to 6:37 AM PST.
Nearby airports
- O02 Nervino Beckwourth, CA · 21 nm
- KSVE Susanville Municipal Susanville, CA · 23 nm
- KRTS Reno/Stead Reno, NV · 32 nm
- O79 Sierraville Dearwater Sierraville, CA · 34 nm
- 2O1 Gansner Field Quincy, CA · 37 nm
- O39 Ravendale Ravendale, CA · 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.