9D1 Gregory Municipal/Flynn Field night times
Gregory, SD
Night of Nov 6 to Nov 7CST
Position lights
§ 91.2095:23 PMto7:21 AM
Sunset to sunrise. Lights on.
2323Z to 1321Z
Night logging
§ 1.15:53 PMto6:50 AM
Civil twilight. Log it as night.
2353Z to 1250Z
Night currency
§ 61.57(b)6:23 PMto6:21 AM
One hour after sunset. Landings count.
0023Z to 1221Z
Evenings at 9D1
When each night begins, through the year. Local time.
| Date | SunsetLights on | Civil twilight endsLog night | 1 hr after sunsetLandings count |
|---|---|---|---|
| Nov 1CST | 5:29 PM | 5:59 PM | 6:29 PM |
| Nov 15CST | 5:13 PM | 5:44 PM | 6:13 PM |
| Dec 1CST | 5:03 PM | 5:35 PM | 6:03 PM |
| Dec 15CST | 5:03 PM | 5:35 PM | 6:03 PM |
| Jan 1CST | 5:13 PM | 5:45 PM | 6:13 PM |
| Jan 15CST | 5:28 PM | 5:59 PM | 6:28 PM |
| Feb 1CST | 5:50 PM | 6:20 PM | 6:50 PM |
| Feb 15CST | 6:08 PM | 6:38 PM | 7:08 PM |
| Mar 1CST | 6:27 PM | 6:55 PM | 7:27 PM |
| Mar 15CDT | 7:44 PM | 8:12 PM | 8:44 PM |
| Apr 1CDT | 8:04 PM | 8:33 PM | 9:04 PM |
| Apr 15CDT | 8:20 PM | 8:50 PM | 9:20 PM |
| May 1CDT | 8:39 PM | 9:10 PM | 9:39 PM |
| May 15CDT | 8:55 PM | 9:28 PM | 9:55 PM |
| Jun 1CDT | 9:11 PM | 9:46 PM | 10:11 PM |
| Jun 15CDT | 9:19 PM | 9:55 PM | 10:19 PM |
| Jul 1CDT | 9:21 PM | 9:57 PM | 10:21 PM |
| Jul 15CDT | 9:15 PM | 9:50 PM | 10:15 PM |
| Aug 1CDT | 8:59 PM | 9:32 PM | 9:59 PM |
| Aug 15CDT | 8:40 PM | 9:11 PM | 9:40 PM |
| Sep 1CDT | 8:13 PM | 8:42 PM | 9:13 PM |
| Sep 15CDT | 7:48 PM | 8:16 PM | 8:48 PM |
| Oct 1CDT | 7:19 PM | 7:47 PM | 8:19 PM |
| Oct 15CDT | 6:55 PM | 7:24 PM | 7:55 PM |
Mornings at 9D1
When each night ends. Local time.
| Date | 1 hr before sunriseLandings stop counting | Civil twilight beginsNight logging ends | SunriseLights off |
|---|---|---|---|
| Nov 1CST | 6:13 AM | 6:43 AM | 7:13 AM |
| Nov 15CST | 6:31 AM | 7:00 AM | 7:31 AM |
| Dec 1CST | 6:50 AM | 7:18 AM | 7:50 AM |
| Dec 15CST | 7:03 AM | 7:30 AM | 8:03 AM |
| Jan 1CST | 7:10 AM | 7:37 AM | 8:10 AM |
| Jan 15CST | 7:07 AM | 7:35 AM | 8:07 AM |
| Feb 1CST | 6:53 AM | 7:23 AM | 7:53 AM |
| Feb 15CST | 6:36 AM | 7:06 AM | 7:36 AM |
| Mar 1CST | 6:14 AM | 6:45 AM | 7:14 AM |
| Mar 15CDT | 6:50 AM | 7:22 AM | 7:50 AM |
| Apr 1CDT | 6:20 AM | 6:51 AM | 7:20 AM |
| Apr 15CDT | 5:56 AM | 6:26 AM | 6:56 AM |
| May 1CDT | 5:31 AM | 6:00 AM | 6:31 AM |
| May 15CDT | 5:14 AM | 5:41 AM | 6:14 AM |
| Jun 1CDT | 5:01 AM | 5:26 AM | 6:01 AM |
| Jun 15CDT | 4:57 AM | 5:22 AM | 5:57 AM |
| Jul 1CDT | 5:01 AM | 5:26 AM | 6:01 AM |
| Jul 15CDT | 5:11 AM | 5:37 AM | 6:11 AM |
| Aug 1CDT | 5:28 AM | 5:55 AM | 6:28 AM |
| Aug 15CDT | 5:43 AM | 6:12 AM | 6:43 AM |
| Sep 1CDT | 6:02 AM | 6:32 AM | 7:02 AM |
| Sep 15CDT | 6:17 AM | 6:48 AM | 7:17 AM |
| Oct 1CDT | 6:35 AM | 7:06 AM | 7:35 AM |
| Oct 15CDT | 6:51 AM | 7:23 AM | 7:51 AM |
Lights and runways
As the FAA lists them. NOTAMs aren't included, so check current NOTAMs before you fly.
ACTVT MIRL RY 13/31 & PAPI RYS 13 & 31 - CTAF.
Runway 13/31
3,799 × 60 ft · Asphalt
Frequencies
Night at 9D1, in short
When can I log night time at 9D1?
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 5:53 PM to 6:50 AM CST.
When do landings at 9D1 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 6:23 PM to 6:21 AM CST.
When are position lights required at 9D1?
From sunset to sunrise (14 CFR 91.209(a)). On the night of Nov 6, 2026, that was 5:23 PM to 7:21 AM CST.
Nearby airports
- KICR Winner Regional Winner, SD · 22 nm
- 1D3 Platte Municipal Platte, SD · 27 nm
- 9V9 Chamberlain Municipal Chamberlain, SD · 33 nm
- 6A6 Kimball Municipal Kimball, SD · 37 nm
- 8D8 Lake Andes Municipal Lake Andes, SD · 38 nm
- KRBE Rock County Bassett, NE · 40 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.