← 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. |
|---|---|---|---|---|---|---|---|---|
| 2041-03-25 Mon | 0 | — | unknown | — | 79.2° 13:45 | 8.44 | 44% | 111.4° |
| 2041-03-26 Tue | 0 | — | unknown | — | 79.2° 13:40 | 8.39 | 33% | 98.3° |
| 2041-03-27 Wed | 0 | — | unknown | — | 79.2° 13:35 | 8.33 | 23% | 84.8° |
| 2041-03-28 Thu | 0 | — | unknown | — | 79.2° 13:30 | 8.28 | 14% | 71.1° |
| 2041-03-29 Fri | 0 | — | unknown | — | 79.2° 13:30 | 8.23 | 7% | 57.4° |
| 2041-03-30 Sat | 0 | — | unknown | — | 79.2° 13:25 | 8.17 | 2% | 44.2° |
| 2041-03-31 Sun | 0 | — | unknown | — | 79.2° 14:20 | 8.12 | 0% | 32.1° |
| 2041-04-01 Mon | 0 | — | unknown | — | 79.2° 14:15 | 8.06 | 1% | 23.0° |
| 2041-04-02 Tue | 0 | — | unknown | — | 79.2° 14:15 | 8.01 | 5% | 20.6° |
| 2041-04-03 Wed | 0 | — | unknown | — | 79.2° 14:10 | 7.95 | 10% | 26.4° |
| 2041-04-04 Thu | 0 | — | unknown | — | 79.2° 14:05 | 7.9 | 18% | 36.1° |
| 2041-04-05 Fri | 0 | — | unknown | — | 79.2° 14:00 | 7.84 | 26% | 47.1° |
| 2041-04-06 Sat | 0 | — | unknown | — | 79.2° 13:55 | 7.78 | 36% | 58.4° |
| 2041-04-07 Sun | 0 | — | unknown | — | 79.2° 13:55 | 7.73 | 46% | 69.7° |
| 2041-04-08 Mon | 0 | — | unknown | — | 79.2° 13:50 | 7.67 | 55% | 80.9° |
| 2041-04-09 Tue | 0 | — | unknown | — | 79.2° 13:45 | 7.62 | 64% | 92.0° |
| 2041-04-10 Wed | 0 | — | unknown | — | 79.2° 13:40 | 7.56 | 73% | 103.1° |
| 2041-04-11 Thu | 0 | — | unknown | — | 79.2° 13:35 | 7.5 | 81% | 114.1° |
| 2041-04-12 Fri | 0 | — | unknown | — | 79.2° 13:35 | 7.44 | 88% | 125.0° |
| 2041-04-13 Sat | 0 | — | unknown | — | 79.2° 13:30 | 7.39 | 94% | 135.7° |
| 2041-04-14 Sun | 0 | — | unknown | — | 79.2° 13:25 | 7.33 | 98% | 145.9° |
| 2041-04-15 Mon | 0 | — | unknown | — | 79.2° 13:20 | 7.27 | 100% | 154.6° |
| 2041-04-16 Tue | 0 | — | unknown | — | 79.2° 13:15 | 7.21 | 100% | 159.4° |
| 2041-04-17 Wed | 0 | — | unknown | — | 79.2° 13:15 | 7.16 | 98% | 157.4° |
| 2041-04-18 Thu | 0 | — | unknown | — | 79.2° 13:10 | 7.1 | 94% | 149.5° |
| 2041-04-19 Fri | 0 | — | unknown | — | 79.2° 13:05 | 7.04 | 88% | 138.9° |
| 2041-04-20 Sat | 0 | — | unknown | — | 79.2° 13:00 | 6.98 | 79% | 127.0° |
| 2041-04-21 Sun | 0 | — | unknown | — | 79.2° 13:00 | 6.92 | 70% | 114.5° |
| 2041-04-22 Mon | 0 | — | unknown | — | 79.2° 12:55 | 6.87 | 59% | 101.5° |
| 2041-04-23 Tue | 0 | — | unknown | — | 79.2° 12:50 | 6.81 | 48% | 88.4° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2041-03-25&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.