← 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. |
|---|---|---|---|---|---|---|---|---|
| 2030-03-31 Sun | 13 | — | unknown | 21:25–21:45 (good, 0.33 h) | 72.5° 16:35 | 8.14 | 4% | 71.0° |
| 2030-04-01 Mon | 12 | — | unknown | 21:25–21:40 (good, 0.25 h) | 72.5° 16:30 | 8.08 | 1% | 58.5° |
| 2030-04-02 Tue | 11 | — | unknown | 21:25–21:35 (good, 0.17 h) | 72.5° 16:25 | 8.03 | 0% | 46.2° |
| 2030-04-03 Wed | 9 | — | unknown | 21:25–21:30 (good, 0.08 h) | 72.5° 16:20 | 7.97 | 1% | 34.1° |
| 2030-04-04 Thu | 7 | — | unknown | 21:30–21:55 (marginal, 0.42 h) | 72.5° 16:20 | 7.91 | 4% | 22.2° |
| 2030-04-05 Fri | 5 | — | unknown | 21:30–21:50 (marginal, 0.33 h) | 72.5° 16:15 | 7.86 | 8% | 10.4° |
| 2030-04-06 Sat | 4 | — | unknown | 21:30–21:50 (marginal, 0.33 h) | 72.5° 16:10 | 7.8 | 14% | 3.0° |
| 2030-04-07 Sun | 3 | — | unknown | 21:35–21:45 (marginal, 0.17 h) | 72.5° 16:05 | 7.75 | 21% | 13.7° |
| 2030-04-08 Mon | 2 | — | unknown | 21:35–21:40 (marginal, 0.08 h) | 72.5° 16:00 | 7.69 | 29% | 25.5° |
| 2030-04-09 Tue | 1 | — | unknown | — | 72.5° 16:00 | 7.63 | 38% | 37.4° |
| 2030-04-10 Wed | 1 | — | unknown | — | 72.5° 15:55 | 7.58 | 48% | 49.6° |
| 2030-04-11 Thu | 1 | — | unknown | — | 72.5° 15:50 | 7.52 | 58% | 62.0° |
| 2030-04-12 Fri | 0 | — | unknown | — | 72.5° 15:45 | 7.46 | 68% | 74.8° |
| 2030-04-13 Sat | 0 | — | unknown | — | 72.5° 15:40 | 7.41 | 77% | 88.1° |
| 2030-04-14 Sun | 0 | — | unknown | — | 72.5° 15:40 | 7.35 | 86% | 101.8° |
| 2030-04-15 Mon | 0 | — | unknown | — | 72.5° 15:35 | 7.29 | 93% | 115.9° |
| 2030-04-16 Tue | 0 | — | unknown | — | 72.5° 15:30 | 7.23 | 98% | 130.5° |
| 2030-04-17 Wed | 0 | — | unknown | — | 72.5° 15:25 | 7.18 | 100% | 145.4° |
| 2030-04-18 Thu | 0 | — | unknown | — | 72.5° 15:25 | 7.12 | 99% | 160.4° |
| 2030-04-19 Fri | 0 | — | unknown | — | 72.5° 15:20 | 7.06 | 95% | 175.0° |
| 2030-04-20 Sat | 0 | — | unknown | — | 72.5° 15:15 | 7.0 | 89% | 169.1° |
| 2030-04-21 Sun | 0 | — | unknown | — | 72.5° 15:10 | 6.94 | 80% | 154.5° |
| 2030-04-22 Mon | 0 | — | unknown | — | 72.5° 15:05 | 6.89 | 70% | 140.2° |
| 2030-04-23 Tue | 0 | — | unknown | — | 72.5° 15:05 | 6.83 | 59% | 126.2° |
| 2030-04-24 Wed | 0 | — | unknown | — | 72.5° 15:00 | 6.77 | 48% | 112.7° |
| 2030-04-25 Thu | 0 | — | unknown | — | 72.5° 14:55 | 6.71 | 38% | 99.5° |
| 2030-04-26 Fri | 0 | — | unknown | — | 72.5° 14:50 | 6.65 | 28% | 86.6° |
| 2030-04-27 Sat | 0 | — | unknown | — | 72.5° 14:45 | 6.59 | 20% | 74.0° |
| 2030-04-28 Sun | 0 | — | unknown | — | 72.5° 14:45 | 6.54 | 12% | 61.6° |
| 2030-04-29 Mon | 0 | — | unknown | — | 72.5° 14:40 | 6.48 | 7% | 49.4° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2030-03-31&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.