← 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. |
|---|---|---|---|---|---|---|---|---|
| 2028-02-21 Mon | 46 | — | unknown | 19:35–21:25 (good, 1.83 h) | 79.1° 15:50 | 10.02 | 10% | 98.0° |
| 2028-02-22 Tue | 44 | — | unknown | 19:35–21:20 (good, 1.75 h) | 79.1° 15:50 | 9.98 | 6% | 86.5° |
| 2028-02-23 Wed | 41 | — | unknown | 19:40–21:15 (good, 1.58 h) | 79.1° 15:45 | 9.93 | 2% | 75.0° |
| 2028-02-24 Thu | 39 | — | unknown | 19:40–21:15 (good, 1.58 h) | 79.1° 15:40 | 9.89 | 0% | 63.6° |
| 2028-02-25 Fri | 38 | — | unknown | 19:40–21:10 (good, 1.5 h) | 79.1° 15:35 | 9.85 | 0% | 52.3° |
| 2028-02-26 Sat | 36 | — | unknown | 19:40–21:05 (good, 1.42 h) | 79.1° 15:35 | 9.8 | 2% | 41.1° |
| 2028-02-27 Sun | 32 | — | unknown | 19:45–21:00 (good, 1.25 h) | 79.1° 15:30 | 9.76 | 6% | 30.3° |
| 2028-02-28 Mon | 28 | — | unknown | 19:45–20:55 (good, 1.17 h) | 79.1° 15:25 | 9.71 | 11% | 20.5° |
| 2028-02-29 Tue | 24 | — | unknown | 19:45–20:45 (good, 1.0 h) | 79.1° 15:20 | 9.67 | 18% | 14.5° |
| 2028-03-01 Wed | 20 | — | unknown | 19:45–20:35 (good, 0.83 h) | 79.1° 15:15 | 9.62 | 26% | 17.1° |
| 2028-03-02 Thu | 15 | — | unknown | 19:50–20:20 (good, 0.5 h) | 79.1° 15:15 | 9.58 | 35% | 26.2° |
| 2028-03-03 Fri | 12 | — | unknown | 19:50–21:05 (marginal, 1.25 h) | 79.1° 15:10 | 9.53 | 45% | 37.6° |
| 2028-03-04 Sat | 9 | — | unknown | 19:50–21:00 (marginal, 1.17 h) | 79.1° 15:05 | 9.48 | 56% | 50.0° |
| 2028-03-05 Sun | 9 | — | unknown | 19:50–20:50 (marginal, 1.0 h) | 79.1° 15:00 | 9.44 | 67% | 63.2° |
| 2028-03-06 Mon | 8 | — | unknown | 19:55–20:50 (marginal, 0.92 h) | 79.1° 14:55 | 9.39 | 77% | 76.8° |
| 2028-03-07 Tue | 9 | — | unknown | 19:55–20:50 (marginal, 0.92 h) | 79.1° 14:55 | 9.34 | 86% | 91.0° |
| 2028-03-08 Wed | 10 | — | unknown | 19:55–20:00 (good, 0.08 h) | 79.1° 14:50 | 9.29 | 93% | 105.4° |
| 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° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2028-02-21&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.