← 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. |
|---|---|---|---|---|---|---|---|---|
| 2030-12-15 Sun | 34 | — | unknown | 18:35–19:50 (good, 1.25 h) | 71.1° 14:45 | 11.49 | 70% | 138.6° |
| 2030-12-16 Mon | 32 | — | unknown | 18:35–19:50 (good, 1.25 h) | 71.1° 14:40 | 11.5 | 61% | 132.6° |
| 2030-12-17 Tue | 31 | — | unknown | 18:35–19:45 (good, 1.17 h) | 71.1° 14:40 | 11.5 | 51% | 124.6° |
| 2030-12-18 Wed | 30 | — | unknown | 18:35–19:40 (good, 1.08 h) | 71.1° 14:35 | 11.5 | 40% | 115.2° |
| 2030-12-19 Thu | 28 | — | unknown | 18:35–19:35 (good, 1.0 h) | 71.1° 14:30 | 11.51 | 30% | 104.8° |
| 2030-12-20 Fri | 27 | — | unknown | 18:35–19:35 (good, 1.0 h) | 71.1° 14:25 | 11.51 | 20% | 93.7° |
| 2030-12-21 Sat | 25 | — | unknown | 18:35–19:30 (good, 0.92 h) | 71.1° 14:25 | 11.51 | 11% | 82.2° |
| 2030-12-22 Sun | 23 | — | unknown | 18:35–19:25 (good, 0.83 h) | 71.1° 14:20 | 11.51 | 5% | 70.5° |
| 2030-12-23 Mon | 22 | — | unknown | 18:40–19:20 (good, 0.67 h) | 71.1° 14:15 | 11.51 | 1% | 59.3° |
| 2030-12-24 Tue | 20 | — | unknown | 18:40–19:15 (good, 0.58 h) | 71.1° 14:10 | 11.5 | 0% | 49.3° |
| 2030-12-25 Wed | 19 | — | unknown | 18:40–19:15 (good, 0.58 h) | 71.1° 14:05 | 11.5 | 2% | 41.6° |
| 2030-12-26 Thu | 17 | — | unknown | 18:40–19:05 (good, 0.42 h) | 71.1° 14:05 | 11.5 | 7% | 37.8° |
| 2030-12-27 Fri | 14 | — | unknown | 18:40–19:00 (good, 0.33 h) | 71.1° 14:00 | 11.49 | 14% | 38.7° |
| 2030-12-28 Sat | 11 | — | unknown | 18:40–18:50 (good, 0.17 h) | 71.1° 13:55 | 11.48 | 23% | 43.6° |
| 2030-12-29 Sun | 8 | — | unknown | 18:10–19:25 (marginal, 1.25 h) | 71.1° 13:50 | 11.48 | 33% | 51.2° |
| 2030-12-30 Mon | 7 | — | unknown | 18:40–19:20 (marginal, 0.67 h) | 71.1° 13:45 | 11.47 | 44% | 60.0° |
| 2030-12-31 Tue | 5 | — | unknown | 18:45–19:15 (marginal, 0.5 h) | 71.1° 13:45 | 11.46 | 54% | 69.4° |
| 2031-01-01 Wed | 4 | — | unknown | 18:45–19:10 (marginal, 0.42 h) | 71.1° 13:40 | 11.45 | 64% | 79.0° |
| 2031-01-02 Thu | 4 | — | unknown | 18:45–19:10 (marginal, 0.42 h) | 71.1° 13:35 | 11.44 | 72% | 88.6° |
| 2031-01-03 Fri | 3 | — | unknown | 18:45–19:05 (marginal, 0.33 h) | 71.1° 13:30 | 11.43 | 81% | 98.1° |
| 2031-01-04 Sat | 3 | — | unknown | 18:45–19:00 (marginal, 0.25 h) | 71.1° 13:30 | 11.42 | 88% | 107.4° |
| 2031-01-05 Sun | 3 | — | unknown | 18:45–18:55 (marginal, 0.17 h) | 71.1° 13:25 | 11.4 | 93% | 116.3° |
| 2031-01-06 Mon | 2 | — | unknown | 18:50–18:55 (marginal, 0.08 h) | 71.1° 13:20 | 11.39 | 97% | 124.7° |
| 2031-01-07 Tue | 1 | — | unknown | — | 71.1° 13:15 | 11.38 | 99% | 132.1° |
| 2031-01-08 Wed | 1 | — | unknown | — | 71.1° 13:10 | 11.36 | 100% | 138.0° |
| 2031-01-09 Thu | 1 | — | unknown | — | 71.1° 13:10 | 11.34 | 99% | 141.7° |
| 2031-01-10 Fri | 1 | — | unknown | — | 71.1° 13:05 | 11.33 | 96% | 142.2° |
| 2031-01-11 Sat | 1 | — | unknown | — | 71.1° 13:00 | 11.31 | 91% | 139.6° |
| 2031-01-12 Sun | 1 | — | unknown | — | 71.1° 12:55 | 11.29 | 84% | 134.1° |
| 2031-01-13 Mon | 0 | — | unknown | — | 71.1° 12:50 | 11.27 | 76% | 126.5° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2030-12-15&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.