KBDU Boulder Municipal night times
Boulder, CO · FAA BDU
Night of Nov 6 to Nov 7MST
Position lights
§ 91.2094:53 PMto6:37 AM
Sunset to sunrise. Lights on.
2353Z to 1337Z
Night logging
§ 1.15:21 PMto6:09 AM
Civil twilight. Log it as night.
0021Z to 1309Z
Night currency
§ 61.57(b)5:53 PMto5:37 AM
One hour after sunset. Landings count.
0053Z to 1237Z
Evenings at KBDU
When each night begins, through the year. Local time.
| Date | SunsetLights on | Civil twilight endsLog night | 1 hr after sunsetLandings count |
|---|---|---|---|
| Nov 1MST | 4:58 PM | 5:26 PM | 5:58 PM |
| Nov 15MST | 4:44 PM | 5:13 PM | 5:44 PM |
| Dec 1MST | 4:36 PM | 5:06 PM | 5:36 PM |
| Dec 15MST | 4:36 PM | 5:07 PM | 5:36 PM |
| Jan 1MST | 4:46 PM | 5:17 PM | 5:46 PM |
| Jan 15MST | 5:00 PM | 5:30 PM | 6:00 PM |
| Feb 1MST | 5:20 PM | 5:49 PM | 6:20 PM |
| Feb 15MST | 5:37 PM | 6:04 PM | 6:37 PM |
| Mar 1MST | 5:53 PM | 6:20 PM | 6:53 PM |
| Mar 15MDT | 7:08 PM | 7:35 PM | 8:08 PM |
| Apr 1MDT | 7:25 PM | 7:53 PM | 8:25 PM |
| Apr 15MDT | 7:39 PM | 8:08 PM | 8:39 PM |
| May 1MDT | 7:56 PM | 8:25 PM | 8:56 PM |
| May 15MDT | 8:09 PM | 8:40 PM | 9:09 PM |
| Jun 1MDT | 8:24 PM | 8:56 PM | 9:24 PM |
| Jun 15MDT | 8:32 PM | 9:04 PM | 9:32 PM |
| Jul 1MDT | 8:34 PM | 9:06 PM | 9:34 PM |
| Jul 15MDT | 8:29 PM | 9:01 PM | 9:29 PM |
| Aug 1MDT | 8:15 PM | 8:45 PM | 9:15 PM |
| Aug 15MDT | 7:58 PM | 8:27 PM | 8:58 PM |
| Sep 1MDT | 7:33 PM | 8:00 PM | 8:33 PM |
| Sep 15MDT | 7:10 PM | 7:37 PM | 8:10 PM |
| Oct 1MDT | 6:43 PM | 7:10 PM | 7:43 PM |
| Oct 15MDT | 6:21 PM | 6:49 PM | 7:21 PM |
Mornings at KBDU
When each night ends. Local time.
| Date | 1 hr before sunriseLandings stop counting | Civil twilight beginsNight logging ends | SunriseLights off |
|---|---|---|---|
| Nov 1MST | 5:30 AM | 6:02 AM | 6:30 AM |
| Nov 15MST | 5:46 AM | 6:17 AM | 6:46 AM |
| Dec 1MST | 6:04 AM | 6:34 AM | 7:04 AM |
| Dec 15MST | 6:16 AM | 6:45 AM | 7:16 AM |
| Jan 1MST | 6:23 AM | 6:52 AM | 7:23 AM |
| Jan 15MST | 6:21 AM | 6:51 AM | 7:21 AM |
| Feb 1MST | 6:10 AM | 6:41 AM | 7:10 AM |
| Feb 15MST | 5:54 AM | 6:26 AM | 6:54 AM |
| Mar 1MST | 5:34 AM | 6:07 AM | 6:34 AM |
| Mar 15MDT | 6:13 AM | 6:46 AM | 7:13 AM |
| Apr 1MDT | 5:45 AM | 6:18 AM | 6:45 AM |
| Apr 15MDT | 5:23 AM | 5:55 AM | 6:23 AM |
| May 1MDT | 5:01 AM | 5:32 AM | 6:01 AM |
| May 15MDT | 4:46 AM | 5:15 AM | 5:46 AM |
| Jun 1MDT | 4:34 AM | 5:02 AM | 5:34 AM |
| Jun 15MDT | 4:31 AM | 4:59 AM | 5:31 AM |
| Jul 1MDT | 4:36 AM | 5:03 AM | 5:36 AM |
| Jul 15MDT | 4:45 AM | 5:13 AM | 5:45 AM |
| Aug 1MDT | 4:59 AM | 5:29 AM | 5:59 AM |
| Aug 15MDT | 5:12 AM | 5:43 AM | 6:12 AM |
| Sep 1MDT | 5:29 AM | 6:01 AM | 6:29 AM |
| Sep 15MDT | 5:42 AM | 6:15 AM | 6:42 AM |
| Oct 1MDT | 5:57 AM | 6:30 AM | 6:57 AM |
| Oct 15MDT | 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.
ACTVT PAPI RWY 26; MIRL RWY 8/26 - CTAF.
Runway 08/26
4,100 × 75 ft · Asphalt
Runway 08G/26G
4,100 × 20 ft · Asphalt
Frequencies
Night at KBDU, in short
When can I log night time at KBDU?
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 MST.
When do landings at KBDU 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 5:53 PM to 5:37 AM MST.
When are position lights required at KBDU?
From sunset to sunrise (14 CFR 91.209(a)). On the night of Nov 6, 2026, that was 4:53 PM to 6:37 AM MST.
Nearby airports
- KLMO Vance Brand Longmont, CO · 8 nm
- KEIK Erie Municipal Erie, CO · 8 nm
- KBJC Rocky Mountain Metro Denver, CO · 9 nm
- 18V Platte Valley Airpark Hudson, CO · 24 nm
- KFNL Northern Colorado Regional Fort Collins/Loveland, CO · 27 nm
- KDEN Denver International Denver, CO · 28 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.