← 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. |
|---|---|---|---|---|---|---|---|---|
| 2028-03-25 Sat | 46 | — | unknown | 02:50–05:40 (good, 1.83 h) | 87.2° 10:05 | 8.43 | 0% | 56.1° |
| 2028-03-26 Sun | 48 | — | unknown | 03:45–05:40 (good, 1.92 h) | 87.3° 10:00 | 8.38 | 1% | 59.6° |
| 2028-03-27 Mon | 49 | — | unknown | 03:40–05:40 (good, 2.0 h) | 87.2° 09:55 | 8.33 | 3% | 64.4° |
| 2028-03-28 Tue | 50 | — | unknown | 03:35–05:35 (good, 2.0 h) | 87.2° 09:50 | 8.27 | 7% | 70.3° |
| 2028-03-29 Wed | 50 | — | unknown | 03:35–05:35 (good, 2.0 h) | 87.2° 09:50 | 8.22 | 13% | 77.1° |
| 2028-03-30 Thu | 50 | — | unknown | 03:30–05:30 (good, 2.0 h) | 87.2° 09:45 | 8.16 | 21% | 84.4° |
| 2028-03-31 Fri | 52 | — | unknown | 03:25–05:30 (good, 2.08 h) | 87.3° 09:40 | 8.11 | 30% | 92.0° |
| 2028-04-01 Sat | 54 | — | unknown | 03:20–05:30 (good, 2.17 h) | 87.2° 09:35 | 8.05 | 40% | 99.7° |
| 2028-04-02 Sun | 53 | — | unknown | 03:15–05:25 (good, 2.17 h) | 87.2° 09:30 | 8.0 | 51% | 107.3° |
| 2028-04-03 Mon | 53 | — | unknown | 03:20–05:25 (good, 2.08 h) | 87.2° 09:30 | 7.94 | 63% | 114.2° |
| 2028-04-04 Tue | 54 | — | unknown | 03:15–05:25 (good, 2.17 h) | 87.3° 09:25 | 7.89 | 73% | 120.1° |
| 2028-04-05 Wed | 53 | — | unknown | 03:15–05:20 (good, 2.08 h) | 87.3° 09:20 | 7.83 | 83% | 124.2° |
| 2028-04-06 Thu | 49 | — | unknown | 03:15–05:20 (good, 2.08 h) | 87.2° 09:15 | 7.78 | 91% | 125.9° |
| 2028-04-07 Fri | 47 | — | unknown | 03:10–05:15 (good, 2.08 h) | 87.2° 09:15 | 7.72 | 97% | 124.9° |
| 2028-04-08 Sat | 48 | — | unknown | 03:05–05:15 (good, 2.17 h) | 87.2° 09:10 | 7.66 | 100% | 121.3° |
| 2028-04-09 Sun | 46 | — | unknown | 03:05–05:15 (good, 2.17 h) | 87.3° 09:05 | 7.61 | 100% | 115.6° |
| 2028-04-10 Mon | 43 | — | unknown | 03:05–05:10 (good, 2.08 h) | 87.2° 09:00 | 7.55 | 97% | 108.6° |
| 2028-04-11 Tue | 41 | — | unknown | 03:05–05:10 (good, 2.08 h) | 87.2° 08:55 | 7.49 | 92% | 101.0° |
| 2028-04-12 Wed | 40 | — | unknown | 03:05–05:05 (good, 2.0 h) | 87.2° 08:55 | 7.44 | 85% | 93.1° |
| 2028-04-13 Thu | 40 | — | unknown | 03:00–05:05 (good, 2.08 h) | 87.2° 08:50 | 7.38 | 76% | 85.3° |
| 2028-04-14 Fri | 42 | — | unknown | 02:50–05:05 (good, 2.25 h) | 87.3° 08:45 | 7.32 | 67% | 78.0° |
| 2028-04-15 Sat | 45 | — | unknown | 02:45–05:00 (good, 2.25 h) | 87.2° 08:40 | 7.26 | 57% | 71.2° |
| 2028-04-16 Sun | 52 | — | unknown | 02:20–05:00 (good, 2.67 h) | 87.2° 08:35 | 7.21 | 48% | 65.3° |
| 2028-04-17 Mon | 56 | — | unknown | 02:20–04:55 (good, 2.58 h) | 87.2° 08:35 | 7.15 | 38% | 60.4° |
| 2028-04-18 Tue | 62 | — | unknown | 02:15–04:55 (good, 2.67 h) | 87.3° 08:30 | 7.09 | 29% | 56.7° |
| 2028-04-19 Wed | 66 | — | unknown | 02:10–04:55 (good, 2.75 h) | 87.3° 08:25 | 7.03 | 21% | 54.5° |
| 2028-04-20 Thu | 69 | — | unknown | 02:05–04:50 (good, 2.75 h) | 87.2° 08:20 | 6.97 | 14% | 54.0° |
| 2028-04-21 Fri | 71 | — | unknown | 02:05–04:50 (good, 2.75 h) | 87.2° 08:20 | 6.92 | 8% | 55.4° |
| 2028-04-22 Sat | 71 | — | unknown | 02:00–04:45 (good, 2.75 h) | 87.2° 08:15 | 6.86 | 4% | 58.4° |
| 2028-04-23 Sun | 73 | — | unknown | 01:55–04:45 (good, 2.83 h) | 87.3° 08:10 | 6.8 | 1% | 62.9° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2028-03-25&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.