← 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. |
|---|---|---|---|---|---|---|---|---|
| 2031-02-26 Wed | 24 | — | unknown | 19:40–20:45 (good, 1.08 h) | 79.1° 15:30 | 9.79 | 29% | 20.4° |
| 2031-02-27 Thu | 18 | — | unknown | 19:45–20:25 (good, 0.67 h) | 79.1° 15:30 | 9.75 | 38% | 28.9° |
| 2031-02-28 Fri | 14 | — | unknown | 19:45–21:20 (marginal, 1.58 h) | 79.1° 15:25 | 9.7 | 48% | 39.2° |
| 2031-03-01 Sat | 12 | — | unknown | 19:45–21:15 (marginal, 1.5 h) | 79.1° 15:20 | 9.66 | 57% | 50.0° |
| 2031-03-02 Sun | 11 | — | unknown | 19:45–21:05 (marginal, 1.33 h) | 79.1° 15:15 | 9.61 | 66% | 61.0° |
| 2031-03-03 Mon | 11 | — | unknown | 19:50–21:05 (marginal, 1.25 h) | 79.1° 15:10 | 9.56 | 75% | 72.3° |
| 2031-03-04 Tue | 11 | — | unknown | 19:50–21:00 (marginal, 1.17 h) | 79.1° 15:10 | 9.52 | 83% | 83.7° |
| 2031-03-05 Wed | 12 | — | unknown | 19:50–19:55 (good, 0.08 h) | 79.1° 15:05 | 9.47 | 89% | 95.3° |
| 2031-03-06 Thu | 14 | — | unknown | 19:50–20:10 (good, 0.33 h) | 79.1° 15:00 | 9.42 | 95% | 107.1° |
| 2031-03-07 Fri | 15 | — | unknown | 19:55–20:15 (good, 0.33 h) | 79.1° 14:55 | 9.38 | 98% | 119.0° |
| 2031-03-08 Sat | 14 | — | unknown | 19:55–20:15 (good, 0.33 h) | 79.1° 14:55 | 9.33 | 100% | 131.0° |
| 2031-03-09 Sun | 13 | — | unknown | 19:55–20:10 (good, 0.25 h) | 79.1° 14:50 | 9.28 | 99% | 142.8° |
| 2031-03-10 Mon | 14 | — | unknown | 19:55–20:10 (good, 0.25 h) | 79.1° 14:45 | 9.23 | 96% | 153.8° |
| 2031-03-11 Tue | 11 | — | unknown | 20:00–20:15 (good, 0.25 h) | 79.1° 14:40 | 9.18 | 91% | 161.8° |
| 2031-03-12 Wed | 10 | — | unknown | 20:00–20:10 (good, 0.17 h) | 79.1° 14:35 | 9.14 | 84% | 161.6° |
| 2031-03-13 Thu | 9 | — | unknown | 20:00–20:05 (good, 0.08 h) | 79.1° 14:35 | 9.09 | 75% | 153.3° |
| 2031-03-14 Fri | 7 | — | unknown | 19:30–20:30 (marginal, 1.0 h) | 79.1° 14:30 | 9.04 | 65% | 141.6° |
| 2031-03-15 Sat | 6 | — | unknown | 20:05–20:25 (marginal, 0.33 h) | 79.1° 14:25 | 8.99 | 54% | 128.9° |
| 2031-03-16 Sun | 5 | — | unknown | 19:30–19:55 (marginal, 0.42 h) | 79.1° 14:20 | 8.94 | 42% | 115.6° |
| 2031-03-17 Mon | 4 | — | unknown | 20:05–20:20 (marginal, 0.25 h) | 79.1° 14:15 | 8.89 | 31% | 102.1° |
| 2031-03-18 Tue | 3 | — | unknown | 20:05–20:15 (marginal, 0.17 h) | 79.1° 14:15 | 8.84 | 21% | 88.5° |
| 2031-03-19 Wed | 2 | — | unknown | 20:05–20:10 (marginal, 0.08 h) | 79.1° 14:10 | 8.78 | 13% | 75.0° |
| 2031-03-20 Thu | 1 | — | unknown | 19:35–19:40 (marginal, 0.08 h) | 79.1° 14:05 | 8.73 | 6% | 61.7° |
| 2031-03-21 Fri | 1 | — | unknown | — | 79.1° 14:00 | 8.68 | 2% | 48.7° |
| 2031-03-22 Sat | 1 | — | unknown | — | 79.1° 13:55 | 8.63 | 0% | 36.3° |
| 2031-03-23 Sun | 1 | — | unknown | — | 79.1° 13:55 | 8.58 | 1% | 25.4° |
| 2031-03-24 Mon | 0 | — | unknown | — | 79.1° 13:50 | 8.52 | 4% | 18.1° |
| 2031-03-25 Tue | 0 | — | unknown | — | 79.1° 13:45 | 8.47 | 8% | 18.3° |
| 2031-03-26 Wed | 0 | — | unknown | — | 79.1° 13:40 | 8.42 | 15% | 25.6° |
| 2031-03-27 Thu | 0 | — | unknown | — | 79.1° 13:40 | 8.36 | 22% | 35.5° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2031-02-26&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.