← 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. |
|---|---|---|---|---|---|---|---|---|
| 2028-03-27 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° |
| 2028-04-08 Sat | 0 | — | unknown | — | 79.1° 13:50 | 7.66 | 100% | 155.2° |
| 2028-04-09 Sun | 0 | — | unknown | — | 79.1° 13:45 | 7.61 | 100% | 164.6° |
| 2028-04-10 Mon | 0 | — | unknown | — | 79.1° 13:40 | 7.55 | 97% | 163.2° |
| 2028-04-11 Tue | 0 | — | unknown | — | 79.1° 13:35 | 7.49 | 92% | 153.3° |
| 2028-04-12 Wed | 0 | — | unknown | — | 79.1° 13:30 | 7.44 | 85% | 141.2° |
| 2028-04-13 Thu | 0 | — | unknown | — | 79.1° 13:30 | 7.38 | 76% | 128.9° |
| 2028-04-14 Fri | 0 | — | unknown | — | 79.1° 13:25 | 7.32 | 67% | 116.7° |
| 2028-04-15 Sat | 0 | — | unknown | — | 79.1° 13:20 | 7.26 | 57% | 104.7° |
| 2028-04-16 Sun | 0 | — | unknown | — | 79.1° 13:15 | 7.21 | 48% | 92.9° |
| 2028-04-17 Mon | 0 | — | unknown | — | 79.1° 13:10 | 7.15 | 38% | 81.4° |
| 2028-04-18 Tue | 0 | — | unknown | — | 79.1° 13:10 | 7.09 | 29% | 69.9° |
| 2028-04-19 Wed | 0 | — | unknown | — | 79.1° 13:05 | 7.03 | 21% | 58.5° |
| 2028-04-20 Thu | 0 | — | unknown | — | 79.1° 13:00 | 6.97 | 14% | 47.3° |
| 2028-04-21 Fri | 0 | — | unknown | — | 79.1° 12:55 | 6.92 | 8% | 36.2° |
| 2028-04-22 Sat | 0 | — | unknown | — | 79.1° 12:55 | 6.86 | 4% | 25.7° |
| 2028-04-23 Sun | 0 | — | unknown | — | 79.1° 12:50 | 6.8 | 1% | 17.0° |
| 2028-04-24 Mon | 0 | — | unknown | — | 79.1° 12:45 | 6.74 | 0% | 14.8° |
| 2028-04-25 Tue | 0 | — | unknown | — | 79.1° 12:40 | 6.68 | 1% | 21.5° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2028-03-27&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.