← single night · whole-night plan
Which nights are best for a target over the coming weeks. The astronomy mark (darkness × altitude × Moon) is computed for every night; the weather and the overall mark exist only where Open-Meteo has a forecast (the next four days) or ERA5 history (past nights) — the rest is honestly blank.
| night of | astronomy | weather | overall | best window | highest | dark h | Moon | Moon sep. |
|---|---|---|---|---|---|---|---|---|
| 2037-02-21 Sat | 15 | — | unknown | 05:10–05:35 (good, 0.42 h) | 71.1° 10:15 | 9.98 | 36% | 100.2° |
| 2037-02-22 Sun | 16 | — | unknown | 05:10–05:35 (good, 0.42 h) | 71.1° 10:10 | 9.94 | 46% | 109.3° |
| 2037-02-23 Mon | 18 | — | unknown | 05:05–05:35 (good, 0.5 h) | 71.1° 10:05 | 9.9 | 57% | 118.2° |
| 2037-02-24 Tue | 17 | — | unknown | 05:00–05:30 (good, 0.5 h) | 71.1° 10:00 | 9.86 | 68% | 126.4° |
| 2037-02-25 Wed | 19 | — | unknown | 04:55–05:30 (good, 0.58 h) | 71.1° 09:55 | 9.81 | 78% | 133.1° |
| 2037-02-26 Thu | 19 | — | unknown | 05:00–05:30 (good, 0.5 h) | 71.1° 09:55 | 9.77 | 86% | 137.2° |
| 2037-02-27 Fri | 17 | — | unknown | 04:55–05:25 (good, 0.5 h) | 71.1° 09:50 | 9.72 | 94% | 137.5° |
| 2037-02-28 Sat | 17 | — | unknown | 04:55–05:25 (good, 0.5 h) | 71.1° 09:45 | 9.68 | 98% | 133.7° |
| 2037-03-01 Sun | 17 | — | unknown | 04:50–05:25 (good, 0.58 h) | 71.1° 09:40 | 9.63 | 100% | 126.5° |
| 2037-03-02 Mon | 17 | — | unknown | 04:50–05:25 (good, 0.58 h) | 71.1° 09:40 | 9.59 | 99% | 117.3° |
| 2037-03-03 Tue | 16 | — | unknown | 04:50–05:20 (good, 0.5 h) | 71.1° 09:35 | 9.54 | 94% | 106.9° |
| 2037-03-04 Wed | 14 | — | unknown | 04:55–05:20 (good, 0.42 h) | 71.1° 09:30 | 9.49 | 88% | 96.2° |
| 2037-03-05 Thu | 14 | — | unknown | 04:55–05:20 (good, 0.42 h) | 71.1° 09:25 | 9.45 | 79% | 85.6° |
| 2037-03-06 Fri | 14 | — | unknown | 04:50–05:15 (good, 0.42 h) | 71.1° 09:20 | 9.4 | 69% | 75.4° |
| 2037-03-07 Sat | 15 | — | unknown | 04:40–05:15 (good, 0.58 h) | 71.1° 09:20 | 9.35 | 59% | 66.1° |
| 2037-03-08 Sun | 17 | — | unknown | 04:35–05:15 (good, 0.67 h) | 71.1° 09:15 | 9.3 | 49% | 57.7° |
| 2037-03-09 Mon | 20 | — | unknown | 04:25–05:10 (good, 0.75 h) | 71.1° 09:10 | 9.26 | 39% | 50.7° |
| 2037-03-10 Tue | 22 | — | unknown | 04:15–05:10 (good, 0.92 h) | 71.1° 09:05 | 9.21 | 29% | 45.5° |
| 2037-03-11 Wed | 26 | — | unknown | 04:00–05:10 (good, 1.17 h) | 71.1° 09:00 | 9.16 | 21% | 42.6° |
| 2037-03-12 Thu | 30 | — | unknown | 03:55–05:05 (good, 1.17 h) | 71.1° 09:00 | 9.11 | 14% | 42.3° |
| 2037-03-13 Fri | 31 | — | unknown | 03:55–05:05 (good, 1.17 h) | 71.1° 08:55 | 9.06 | 8% | 44.7° |
| 2037-03-14 Sat | 33 | — | unknown | 03:50–05:05 (good, 1.25 h) | 71.1° 08:50 | 9.01 | 4% | 49.3° |
| 2037-03-15 Sun | 32 | — | unknown | 03:45–05:00 (good, 1.25 h) | 71.1° 08:45 | 8.96 | 1% | 55.5° |
| 2037-03-16 Mon | 33 | — | unknown | 03:40–05:00 (good, 1.33 h) | 71.1° 08:45 | 8.91 | 0% | 62.9° |
| 2037-03-17 Tue | 34 | — | unknown | 03:35–04:55 (good, 1.33 h) | 71.1° 08:40 | 8.86 | 1% | 71.1° |
| 2037-03-18 Wed | 35 | — | unknown | 03:35–04:55 (good, 1.33 h) | 71.1° 08:35 | 8.81 | 4% | 79.8° |
| 2037-03-19 Thu | 36 | — | unknown | 03:30–04:55 (good, 1.42 h) | 71.1° 08:30 | 8.76 | 8% | 88.7° |
| 2037-03-20 Fri | 36 | — | unknown | 03:25–04:50 (good, 1.42 h) | 71.1° 08:25 | 8.7 | 14% | 97.9° |
| 2037-03-21 Sat | 38 | — | unknown | 03:20–04:50 (good, 1.5 h) | 71.1° 08:25 | 8.65 | 22% | 107.0° |
| 2037-03-22 Sun | 39 | — | unknown | 03:20–04:50 (good, 1.5 h) | 71.1° 08:20 | 8.6 | 31% | 115.8° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2037-02-21&days=30"
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&days=30&format=csv" -o m31-calendar.csvOne row per night: score_astronomy always, score_weather / score only where a forecast or history exists (null otherwise, with weather_source saying which), best window, dark hours, Moon illumination and separation, transit. 7–60 nights. Errors: 400 with invalid_date or target_unresolved. Results are cached for six hours; calculation version 2026-10-10.1.