← 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. |
|---|---|---|---|---|---|---|---|---|
| 2036-04-27 Sun | 0 | — | unknown | — | 79.1° 12:35 | 6.56 | 3% | 34.4° |
| 2036-04-28 Mon | 0 | — | unknown | — | 79.2° 12:30 | 6.5 | 8% | 45.2° |
| 2036-04-29 Tue | 0 | — | unknown | — | 79.2° 12:25 | 6.45 | 15% | 57.2° |
| 2036-04-30 Wed | 0 | — | unknown | — | 79.1° 12:20 | 6.39 | 25% | 69.9° |
| 2036-05-01 Thu | 0 | — | unknown | — | 79.1° 12:15 | 6.33 | 35% | 82.8° |
| 2036-05-02 Fri | 0 | — | unknown | — | 79.1° 12:15 | 6.27 | 46% | 95.7° |
| 2036-05-03 Sat | 0 | — | unknown | — | 79.2° 12:10 | 6.21 | 58% | 108.6° |
| 2036-05-04 Sun | 0 | — | unknown | — | 79.2° 12:05 | 6.16 | 69% | 121.1° |
| 2036-05-05 Mon | 0 | — | unknown | — | 79.1° 12:00 | 6.1 | 78% | 133.0° |
| 2036-05-06 Tue | 0 | — | unknown | — | 79.1° 11:55 | 6.04 | 87% | 143.8° |
| 2036-05-07 Wed | 0 | — | unknown | — | 79.2° 11:50 | 5.99 | 93% | 152.2° |
| 2036-05-08 Thu | 0 | — | unknown | — | 79.2° 11:45 | 5.93 | 98% | 155.9° |
| 2036-05-09 Fri | 0 | — | unknown | — | 79.1° 11:40 | 5.87 | 100% | 153.1° |
| 2036-05-10 Sat | 0 | — | unknown | — | 79.1° 11:40 | 5.82 | 99% | 145.6° |
| 2036-05-11 Sun | 0 | — | unknown | — | 79.2° 11:35 | 5.76 | 97% | 136.0° |
| 2036-05-12 Mon | 0 | — | unknown | — | 79.2° 11:30 | 5.71 | 93% | 125.6° |
| 2036-05-13 Tue | 0 | — | unknown | — | 79.1° 11:25 | 5.65 | 87% | 114.8° |
| 2036-05-14 Wed | 0 | — | unknown | — | 79.1° 11:20 | 5.6 | 80% | 104.0° |
| 2036-05-15 Thu | 0 | — | unknown | — | 79.1° 11:20 | 5.55 | 72% | 93.2° |
| 2036-05-16 Fri | 0 | — | unknown | — | 79.2° 11:15 | 5.49 | 63% | 82.3° |
| 2036-05-17 Sat | 0 | — | unknown | — | 79.2° 11:10 | 5.44 | 54% | 71.6° |
| 2036-05-18 Sun | 0 | — | unknown | — | 79.1° 11:05 | 5.39 | 45% | 60.9° |
| 2036-05-19 Mon | 0 | — | unknown | — | 79.1° 11:05 | 5.34 | 35% | 50.4° |
| 2036-05-20 Tue | 0 | — | unknown | — | 79.1° 11:00 | 5.29 | 26% | 40.2° |
| 2036-05-21 Wed | 0 | — | unknown | — | 79.2° 10:55 | 5.24 | 18% | 31.3° |
| 2036-05-22 Thu | 0 | — | unknown | — | 79.2° 10:50 | 5.19 | 10% | 25.2° |
| 2036-05-23 Fri | 0 | — | unknown | — | 79.1° 10:45 | 5.15 | 5% | 24.9° |
| 2036-05-24 Sat | 0 | — | unknown | — | 79.1° 10:45 | 5.1 | 1% | 31.0° |
| 2036-05-25 Sun | 0 | — | unknown | — | 79.2° 10:40 | 5.06 | 0% | 41.0° |
| 2036-05-26 Mon | 0 | — | unknown | — | 79.2° 10:35 | 5.01 | 2% | 53.0° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2036-04-27&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.