← 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. |
|---|---|---|---|---|---|---|---|---|
| 2028-03-09 Thu | 11 | — | unknown | 19:55–20:05 (good, 0.17 h) | 79.1° 14:45 | 9.25 | 98% | 120.0° |
| 2028-03-10 Fri | 10 | — | unknown | 19:55–20:05 (good, 0.17 h) | 79.1° 14:40 | 9.2 | 100% | 134.5° |
| 2028-03-11 Sat | 9 | — | unknown | 19:25–20:40 (marginal, 1.25 h) | 79.1° 14:40 | 9.15 | 99% | 148.3° |
| 2028-03-12 Sun | 9 | — | unknown | 20:00–20:05 (good, 0.08 h) | 79.1° 14:35 | 9.1 | 95% | 160.3° |
| 2028-03-13 Mon | 8 | — | unknown | 19:30–20:30 (marginal, 1.0 h) | 79.1° 14:30 | 9.05 | 88% | 165.7° |
| 2028-03-14 Tue | 6 | — | unknown | 19:30–20:25 (marginal, 0.92 h) | 79.1° 14:25 | 9.0 | 80% | 159.6° |
| 2028-03-15 Wed | 5 | — | unknown | 20:05–20:25 (marginal, 0.33 h) | 79.1° 14:20 | 8.95 | 70% | 148.5° |
| 2028-03-16 Thu | 4 | — | unknown | 20:05–20:20 (marginal, 0.25 h) | 79.1° 14:20 | 8.9 | 60% | 136.6° |
| 2028-03-17 Fri | 3 | — | unknown | 20:05–20:15 (marginal, 0.17 h) | 79.1° 14:15 | 8.85 | 50% | 124.6° |
| 2028-03-18 Sat | 3 | — | unknown | 20:05–20:10 (marginal, 0.08 h) | 79.1° 14:10 | 8.8 | 41% | 112.7° |
| 2028-03-19 Sun | 1 | — | unknown | 19:35–19:40 (marginal, 0.08 h) | 79.1° 14:05 | 8.75 | 31% | 101.0° |
| 2028-03-20 Mon | 1 | — | unknown | — | 79.1° 14:00 | 8.7 | 23% | 89.5° |
| 2028-03-21 Tue | 1 | — | unknown | — | 79.1° 14:00 | 8.64 | 16% | 78.0° |
| 2028-03-22 Wed | 1 | — | unknown | — | 79.1° 13:55 | 8.59 | 9% | 66.6° |
| 2028-03-23 Thu | 1 | — | unknown | — | 79.1° 13:50 | 8.54 | 5% | 55.3° |
| 2028-03-24 Fri | 0 | — | unknown | — | 79.1° 13:45 | 8.49 | 2% | 44.0° |
| 2028-03-25 Sat | 0 | — | unknown | — | 79.1° 13:45 | 8.43 | 0% | 33.0° |
| 2028-03-26 Sun | 0 | — | unknown | — | 79.1° 14:40 | 8.38 | 1% | 22.9° |
| 2028-03-27 Mon | 0 | — | unknown | — | 79.1° 14:35 | 8.33 | 3% | 15.4° |
| 2028-03-28 Tue | 0 | — | unknown | — | 79.1° 14:30 | 8.27 | 7% | 15.8° |
| 2028-03-29 Wed | 0 | — | unknown | — | 79.1° 14:25 | 8.22 | 13% | 23.9° |
| 2028-03-30 Thu | 0 | — | unknown | — | 79.1° 14:25 | 8.16 | 21% | 34.9° |
| 2028-03-31 Fri | 0 | — | unknown | — | 79.1° 14:20 | 8.11 | 30% | 46.9° |
| 2028-04-01 Sat | 0 | — | unknown | — | 79.1° 14:15 | 8.05 | 40% | 59.6° |
| 2028-04-02 Sun | 0 | — | unknown | — | 79.1° 14:10 | 8.0 | 51% | 72.7° |
| 2028-04-03 Mon | 0 | — | unknown | — | 79.1° 14:05 | 7.94 | 63% | 86.2° |
| 2028-04-04 Tue | 0 | — | unknown | — | 79.1° 14:05 | 7.89 | 73% | 100.1° |
| 2028-04-05 Wed | 0 | — | unknown | — | 79.1° 14:00 | 7.83 | 83% | 114.2° |
| 2028-04-06 Thu | 0 | — | unknown | — | 79.1° 13:55 | 7.78 | 91% | 128.3° |
| 2028-04-07 Fri | 0 | — | unknown | — | 79.1° 13:50 | 7.72 | 97% | 142.3° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2028-03-09&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.