← 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. |
|---|---|---|---|---|---|---|---|---|
| 2030-03-25 Mon | 0 | — | unknown | — | 79.1° 13:45 | 8.46 | 55% | 121.6° |
| 2030-03-26 Tue | 0 | — | unknown | — | 79.1° 13:40 | 8.41 | 44% | 108.4° |
| 2030-03-27 Wed | 0 | — | unknown | — | 79.1° 13:35 | 8.35 | 34% | 95.3° |
| 2030-03-28 Thu | 0 | — | unknown | — | 79.1° 13:35 | 8.3 | 24% | 82.5° |
| 2030-03-29 Fri | 0 | — | unknown | — | 79.1° 13:30 | 8.24 | 16% | 70.0° |
| 2030-03-30 Sat | 0 | — | unknown | — | 79.1° 13:25 | 8.19 | 9% | 57.7° |
| 2030-03-31 Sun | 0 | — | unknown | — | 79.1° 14:20 | 8.14 | 4% | 45.8° |
| 2030-04-01 Mon | 0 | — | unknown | — | 79.1° 14:15 | 8.08 | 1% | 34.5° |
| 2030-04-02 Tue | 0 | — | unknown | — | 79.1° 14:15 | 8.03 | 0% | 24.4° |
| 2030-04-03 Wed | 0 | — | unknown | — | 79.1° 14:10 | 7.97 | 1% | 17.1° |
| 2030-04-04 Thu | 0 | — | unknown | — | 79.1° 14:05 | 7.91 | 4% | 16.6° |
| 2030-04-05 Fri | 0 | — | unknown | — | 79.1° 14:00 | 7.86 | 8% | 23.2° |
| 2030-04-06 Sat | 0 | — | unknown | — | 79.1° 13:55 | 7.8 | 14% | 32.7° |
| 2030-04-07 Sun | 0 | — | unknown | — | 79.1° 13:55 | 7.75 | 21% | 43.3° |
| 2030-04-08 Mon | 0 | — | unknown | — | 79.1° 13:50 | 7.69 | 29% | 54.4° |
| 2030-04-09 Tue | 0 | — | unknown | — | 79.1° 13:45 | 7.63 | 38% | 65.7° |
| 2030-04-10 Wed | 0 | — | unknown | — | 79.1° 13:40 | 7.58 | 48% | 77.4° |
| 2030-04-11 Thu | 0 | — | unknown | — | 79.1° 13:40 | 7.52 | 58% | 89.4° |
| 2030-04-12 Fri | 0 | — | unknown | — | 79.1° 13:35 | 7.46 | 68% | 101.7° |
| 2030-04-13 Sat | 0 | — | unknown | — | 79.1° 13:30 | 7.41 | 77% | 114.4° |
| 2030-04-14 Sun | 0 | — | unknown | — | 79.1° 13:25 | 7.35 | 86% | 127.4° |
| 2030-04-15 Mon | 0 | — | unknown | — | 79.1° 13:20 | 7.29 | 93% | 140.5° |
| 2030-04-16 Tue | 0 | — | unknown | — | 79.1° 13:20 | 7.23 | 98% | 153.1° |
| 2030-04-17 Wed | 0 | — | unknown | — | 79.1° 13:15 | 7.18 | 100% | 162.7° |
| 2030-04-18 Thu | 0 | — | unknown | — | 79.1° 13:10 | 7.12 | 99% | 162.4° |
| 2030-04-19 Fri | 0 | — | unknown | — | 79.1° 13:05 | 7.06 | 95% | 152.3° |
| 2030-04-20 Sat | 0 | — | unknown | — | 79.1° 13:00 | 7.0 | 89% | 139.3° |
| 2030-04-21 Sun | 0 | — | unknown | — | 79.1° 13:00 | 6.94 | 80% | 125.6° |
| 2030-04-22 Mon | 0 | — | unknown | — | 79.1° 12:55 | 6.89 | 70% | 112.0° |
| 2030-04-23 Tue | 0 | — | unknown | — | 79.1° 12:50 | 6.83 | 59% | 98.5° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2030-03-25&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.