← 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. |
|---|---|---|---|---|---|---|---|---|
| 2031-03-12 Wed | 7 | — | unknown | 20:00–20:30 (marginal, 0.5 h) | 89.7° 13:45 | 9.14 | 84% | 146.8° |
| 2031-03-13 Thu | 6 | — | unknown | 20:00–20:25 (marginal, 0.42 h) | 89.6° 13:40 | 9.09 | 75% | 139.8° |
| 2031-03-14 Fri | 5 | — | unknown | 20:00–20:20 (marginal, 0.33 h) | 89.5° 13:40 | 9.04 | 65% | 130.2° |
| 2031-03-15 Sat | 3 | — | unknown | 19:30–19:45 (marginal, 0.25 h) | 89.7° 13:35 | 8.99 | 54% | 119.2° |
| 2031-03-16 Sun | 3 | — | unknown | 19:30–19:40 (marginal, 0.17 h) | 89.7° 13:30 | 8.94 | 42% | 107.4° |
| 2031-03-17 Mon | 2 | — | unknown | 20:05–20:10 (marginal, 0.08 h) | 89.7° 13:25 | 8.89 | 31% | 95.3° |
| 2031-03-18 Tue | 1 | — | unknown | — | 89.5° 13:20 | 8.84 | 21% | 83.1° |
| 2031-03-19 Wed | 1 | — | unknown | — | 89.6° 13:20 | 8.78 | 13% | 71.0° |
| 2031-03-20 Thu | 1 | — | unknown | — | 89.7° 13:15 | 8.73 | 6% | 59.3° |
| 2031-03-21 Fri | 1 | — | unknown | — | 89.7° 13:10 | 8.68 | 2% | 48.6° |
| 2031-03-22 Sat | 0 | — | unknown | — | 89.6° 13:05 | 8.63 | 0% | 39.3° |
| 2031-03-23 Sun | 0 | — | unknown | — | 89.5° 13:05 | 8.58 | 1% | 32.8° |
| 2031-03-24 Mon | 0 | — | unknown | — | 89.6° 13:00 | 8.52 | 4% | 30.6° |
| 2031-03-25 Tue | 0 | — | unknown | — | 89.7° 12:55 | 8.47 | 8% | 33.1° |
| 2031-03-26 Wed | 0 | — | unknown | — | 89.7° 12:50 | 8.42 | 15% | 39.3° |
| 2031-03-27 Thu | 0 | — | unknown | — | 89.6° 12:45 | 8.36 | 22% | 47.4° |
| 2031-03-28 Fri | 0 | — | unknown | — | 89.5° 12:45 | 8.31 | 31% | 56.6° |
| 2031-03-29 Sat | 0 | — | unknown | — | 89.7° 12:40 | 8.26 | 40% | 66.3° |
| 2031-03-30 Sun | 0 | — | unknown | — | 89.7° 13:35 | 8.2 | 49% | 76.3° |
| 2031-03-31 Mon | 0 | — | unknown | — | 89.7° 13:30 | 8.15 | 59% | 86.4° |
| 2031-04-01 Tue | 0 | — | unknown | — | 89.5° 13:25 | 8.09 | 68% | 96.7° |
| 2031-04-02 Wed | 0 | — | unknown | — | 89.6° 13:25 | 8.04 | 76% | 107.1° |
| 2031-04-03 Thu | 0 | — | unknown | — | 89.7° 13:20 | 7.98 | 84% | 117.5° |
| 2031-04-04 Fri | 0 | — | unknown | — | 89.7° 13:15 | 7.93 | 91% | 127.6° |
| 2031-04-05 Sat | 0 | — | unknown | — | 89.6° 13:10 | 7.87 | 96% | 137.0° |
| 2031-04-06 Sun | 0 | — | unknown | — | 89.5° 13:05 | 7.82 | 99% | 144.8° |
| 2031-04-07 Mon | 0 | — | unknown | — | 89.6° 13:05 | 7.76 | 100% | 149.1° |
| 2031-04-08 Tue | 0 | — | unknown | — | 89.7° 13:00 | 7.7 | 98% | 148.1° |
| 2031-04-09 Wed | 0 | — | unknown | — | 89.7° 12:55 | 7.65 | 94% | 142.1° |
| 2031-04-10 Thu | 0 | — | unknown | — | 89.6° 12:50 | 7.59 | 87% | 132.8° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2031-03-12&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.