S40 Prosser night times
Prosser, WA
Night of Nov 6 to Nov 7PST
Position lights
§ 91.2094:37 PMto6:49 AM
Sunset to sunrise. Lights on.
0037Z to 1449Z
Night logging
§ 1.15:09 PMto6:17 AM
Civil twilight. Log it as night.
0109Z to 1417Z
Night currency
§ 61.57(b)5:37 PMto5:49 AM
One hour after sunset. Landings count.
0137Z to 1349Z
Evenings at S40
When each night begins, through the year. Local time.
| Date | SunsetLights on | Civil twilight endsLog night | 1 hr after sunsetLandings count |
|---|---|---|---|
| Nov 1PST | 4:44 PM | 5:16 PM | 5:44 PM |
| Nov 15PST | 4:27 PM | 4:59 PM | 5:27 PM |
| Dec 1PST | 4:15 PM | 4:49 PM | 5:15 PM |
| Dec 15PST | 4:14 PM | 4:48 PM | 5:14 PM |
| Jan 1PST | 4:24 PM | 4:58 PM | 5:24 PM |
| Jan 15PST | 4:40 PM | 5:13 PM | 5:40 PM |
| Feb 1PST | 5:04 PM | 5:36 PM | 6:04 PM |
| Feb 15PST | 5:25 PM | 5:56 PM | 6:25 PM |
| Mar 1PST | 5:45 PM | 6:16 PM | 6:45 PM |
| Mar 15PDT | 7:05 PM | 7:35 PM | 8:05 PM |
| Apr 1PDT | 7:28 PM | 7:58 PM | 8:28 PM |
| Apr 15PDT | 7:47 PM | 8:18 PM | 8:47 PM |
| May 1PDT | 8:08 PM | 8:41 PM | 9:08 PM |
| May 15PDT | 8:25 PM | 9:01 PM | 9:25 PM |
| Jun 1PDT | 8:43 PM | 9:21 PM | 9:43 PM |
| Jun 15PDT | 8:53 PM | 9:31 PM | 9:53 PM |
| Jul 1PDT | 8:54 PM | 9:33 PM | 9:54 PM |
| Jul 15PDT | 8:47 PM | 9:25 PM | 9:47 PM |
| Aug 1PDT | 8:29 PM | 9:04 PM | 9:29 PM |
| Aug 15PDT | 8:08 PM | 8:41 PM | 9:08 PM |
| Sep 1PDT | 7:38 PM | 8:09 PM | 8:38 PM |
| Sep 15PDT | 7:11 PM | 7:41 PM | 8:11 PM |
| Oct 1PDT | 6:39 PM | 7:09 PM | 7:39 PM |
| Oct 15PDT | 6:13 PM | 6:43 PM | 7:13 PM |
Mornings at S40
When each night ends. Local time.
| Date | 1 hr before sunriseLandings stop counting | Civil twilight beginsNight logging ends | SunriseLights off |
|---|---|---|---|
| Nov 1PST | 5:41 AM | 6:09 AM | 6:41 AM |
| Nov 15PST | 6:01 AM | 6:28 AM | 7:01 AM |
| Dec 1PST | 6:22 AM | 6:48 AM | 7:22 AM |
| Dec 15PST | 6:35 AM | 7:01 AM | 7:35 AM |
| Jan 1PST | 6:42 AM | 7:07 AM | 7:42 AM |
| Jan 15PST | 6:38 AM | 7:04 AM | 7:38 AM |
| Feb 1PST | 6:22 AM | 6:50 AM | 7:22 AM |
| Feb 15PST | 6:02 AM | 6:31 AM | 7:02 AM |
| Mar 1PST | 5:38 AM | 6:08 AM | 6:38 AM |
| Mar 15PDT | 6:12 AM | 6:42 AM | 7:12 AM |
| Apr 1PDT | 5:39 AM | 6:09 AM | 6:39 AM |
| Apr 15PDT | 5:13 AM | 5:41 AM | 6:13 AM |
| May 1PDT | 4:46 AM | 5:12 AM | 5:46 AM |
| May 15PDT | 4:26 AM | 4:51 AM | 5:26 AM |
| Jun 1PDT | 4:11 AM | 4:34 AM | 5:11 AM |
| Jun 15PDT | 4:07 AM | 4:28 AM | 5:07 AM |
| Jul 1PDT | 4:11 AM | 4:33 AM | 5:11 AM |
| Jul 15PDT | 4:22 AM | 4:45 AM | 5:22 AM |
| Aug 1PDT | 4:41 AM | 5:06 AM | 5:41 AM |
| Aug 15PDT | 4:58 AM | 5:25 AM | 5:58 AM |
| Sep 1PDT | 5:20 AM | 5:49 AM | 6:20 AM |
| Sep 15PDT | 5:37 AM | 6:07 AM | 6:37 AM |
| Oct 1PDT | 5:58 AM | 6:28 AM | 6:58 AM |
| Oct 15PDT | 6:16 AM | 6:46 AM | 7:16 AM |
Lights and runways
As the FAA lists them. NOTAMs aren't included, so check current NOTAMs before you fly.
TWYS MKD FOR NGT OPNS WITH RETRO-REFLECTIVE DEVICES.
ACTVT REIL RWYS 08 & 26; PAPI RWYS 08 & 26; MIRL RWY 08/26 - CTAF.
Runway 08/26
3,452 × 61 ft · Asphalt
Frequencies
Night at S40, in short
When can I log night time at S40?
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 5:09 PM to 6:17 AM PST.
When do landings at S40 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 5:37 PM to 5:49 AM PST.
When are position lights required at S40?
From sunset to sunrise (14 CFR 91.209(a)). On the night of Nov 6, 2026, that was 4:37 PM to 6:49 AM PST.
Nearby airports
- 1S5 Sunnyside Municipal Sunnyside, WA · 10 nm
- KRLD Richland Richland, WA · 21 nm
- M50 Boardman Boardman, OR · 24 nm
- KPSC Tri-Cities Pasco, WA · 28 nm
- M94 Desert Aire Regional Mattawa, WA · 29 nm
- KHRI Hermiston Municipal Hermiston, OR · 32 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.