4S4 Skyport night times
Cornelius, OR
Night of Nov 6 to Nov 7PST
Position lights
§ 91.2094:52 PMto7:01 AM
Sunset to sunrise. Lights on.
0052Z to 1501Z
Night logging
§ 1.15:23 PMto6:29 AM
Civil twilight. Log it as night.
0123Z to 1429Z
Night currency
§ 61.57(b)5:52 PMto6:01 AM
One hour after sunset. Landings count.
0152Z to 1401Z
Evenings at 4S4
When each night begins, through the year. Local time.
| Date | SunsetLights on | Civil twilight endsLog night | 1 hr after sunsetLandings count |
|---|---|---|---|
| Nov 1PST | 4:59 PM | 5:30 PM | 5:59 PM |
| Nov 15PST | 4:41 PM | 5:14 PM | 5:41 PM |
| Dec 1PST | 4:30 PM | 5:04 PM | 5:30 PM |
| Dec 15PST | 4:29 PM | 5:03 PM | 5:29 PM |
| Jan 1PST | 4:39 PM | 5:13 PM | 5:39 PM |
| Jan 15PST | 4:55 PM | 5:28 PM | 5:55 PM |
| Feb 1PST | 5:19 PM | 5:50 PM | 6:19 PM |
| Feb 15PST | 5:39 PM | 6:10 PM | 6:39 PM |
| Mar 1PST | 5:59 PM | 6:29 PM | 6:59 PM |
| Mar 15PDT | 7:18 PM | 7:48 PM | 8:18 PM |
| Apr 1PDT | 7:40 PM | 8:10 PM | 8:40 PM |
| Apr 15PDT | 7:59 PM | 8:30 PM | 8:59 PM |
| May 1PDT | 8:19 PM | 8:52 PM | 9:19 PM |
| May 15PDT | 8:36 PM | 9:11 PM | 9:36 PM |
| Jun 1PDT | 8:54 PM | 9:31 PM | 9:54 PM |
| Jun 15PDT | 9:03 PM | 9:41 PM | 10:03 PM |
| Jul 1PDT | 9:05 PM | 9:43 PM | 10:05 PM |
| Jul 15PDT | 8:58 PM | 9:35 PM | 9:58 PM |
| Aug 1PDT | 8:41 PM | 9:15 PM | 9:41 PM |
| Aug 15PDT | 8:20 PM | 8:52 PM | 9:20 PM |
| Sep 1PDT | 7:50 PM | 8:21 PM | 8:50 PM |
| Sep 15PDT | 7:23 PM | 7:53 PM | 8:23 PM |
| Oct 1PDT | 6:52 PM | 7:22 PM | 7:52 PM |
| Oct 15PDT | 6:27 PM | 6:57 PM | 7:27 PM |
Mornings at 4S4
When each night ends. Local time.
| Date | 1 hr before sunriseLandings stop counting | Civil twilight beginsNight logging ends | SunriseLights off |
|---|---|---|---|
| Nov 1PST | 5:52 AM | 6:21 AM | 6:52 AM |
| Nov 15PST | 6:12 AM | 6:40 AM | 7:12 AM |
| Dec 1PST | 6:32 AM | 6:59 AM | 7:32 AM |
| Dec 15PST | 6:46 AM | 7:12 AM | 7:46 AM |
| Jan 1PST | 6:53 AM | 7:19 AM | 7:53 AM |
| Jan 15PST | 6:49 AM | 7:16 AM | 7:49 AM |
| Feb 1PST | 6:33 AM | 7:02 AM | 7:33 AM |
| Feb 15PST | 6:14 AM | 6:44 AM | 7:14 AM |
| Mar 1PST | 5:51 AM | 6:21 AM | 6:51 AM |
| Mar 15PDT | 6:25 AM | 6:55 AM | 7:25 AM |
| Apr 1PDT | 5:53 AM | 6:23 AM | 6:53 AM |
| Apr 15PDT | 5:27 AM | 5:56 AM | 6:27 AM |
| May 1PDT | 5:00 AM | 5:27 AM | 6:00 AM |
| May 15PDT | 4:41 AM | 5:07 AM | 5:41 AM |
| Jun 1PDT | 4:27 AM | 4:50 AM | 5:27 AM |
| Jun 15PDT | 4:23 AM | 4:45 AM | 5:23 AM |
| Jul 1PDT | 4:27 AM | 4:49 AM | 5:27 AM |
| Jul 15PDT | 4:38 AM | 5:01 AM | 5:38 AM |
| Aug 1PDT | 4:56 AM | 5:22 AM | 5:56 AM |
| Aug 15PDT | 5:13 AM | 5:40 AM | 6:13 AM |
| Sep 1PDT | 5:33 AM | 6:03 AM | 6:33 AM |
| Sep 15PDT | 5:51 AM | 6:21 AM | 6:51 AM |
| Oct 1PDT | 6:10 AM | 6:41 AM | 7:10 AM |
| Oct 15PDT | 6:29 AM | 6:59 AM | 7:29 AM |
Lights and runways
As the FAA lists them. NOTAMs aren't included, so check current NOTAMs before you fly.
Runway 16/34
2,000 × 45 ft · Turf
Frequencies
Night at 4S4, in short
When can I log night time at 4S4?
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 6:29 AM PST.
When do landings at 4S4 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 6:01 AM PST.
When are position lights required at 4S4?
From sunset to sunrise (14 CFR 91.209(a)). On the night of Nov 6, 2026, that was 4:52 PM to 7:01 AM PST.
Nearby airports
- KHIO Portland-Hillsboro Portland, OR · 5 nm
- 7S3 Stark's Twin Oaks Airpark Hillsboro, OR · 10 nm
- KSPB Scappoose Scappoose, OR · 14 nm
- 17S Chehalem Airpark Newberg, OR · 16 nm
- KVUO Pearson Field Vancouver, WA · 17 nm
- 2S6 Sportsman Airpark Newberg, OR · 18 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.