← 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. |
|---|---|---|---|---|---|---|---|---|
| 2030-03-13 Wed | 15 | — | unknown | 20:00–22:05 (marginal, 2.08 h) | 72.5° 16:45 | 9.07 | 65% | 41.5° |
| 2030-03-14 Thu | 14 | — | unknown | 20:00–22:00 (marginal, 2.0 h) | 72.5° 16:40 | 9.02 | 74% | 54.0° |
| 2030-03-15 Fri | 15 | — | unknown | 20:05–22:00 (marginal, 1.92 h) | 72.5° 16:35 | 8.97 | 83% | 66.9° |
| 2030-03-16 Sat | 17 | — | unknown | 20:05–22:00 (marginal, 1.92 h) | 72.5° 16:30 | 8.92 | 90% | 80.1° |
| 2030-03-17 Sun | 21 | — | unknown | 20:05–20:45 (good, 0.67 h) | 72.5° 16:30 | 8.87 | 96% | 93.8° |
| 2030-03-18 Mon | 26 | — | unknown | 20:05–21:15 (good, 1.17 h) | 72.5° 16:25 | 8.82 | 99% | 108.0° |
| 2030-03-19 Tue | 29 | — | unknown | 20:10–21:20 (good, 1.17 h) | 72.5° 16:20 | 8.77 | 100% | 122.4° |
| 2030-03-20 Wed | 29 | — | unknown | 20:10–21:20 (good, 1.17 h) | 72.5° 16:15 | 8.72 | 98% | 137.0° |
| 2030-03-21 Thu | 32 | — | unknown | 20:10–21:15 (good, 1.08 h) | 72.5° 16:15 | 8.67 | 93% | 151.7° |
| 2030-03-22 Fri | 30 | — | unknown | 20:10–21:20 (good, 1.17 h) | 72.5° 16:10 | 8.62 | 86% | 166.4° |
| 2030-03-23 Sat | 28 | — | unknown | 20:15–21:15 (good, 1.0 h) | 72.5° 16:05 | 8.56 | 77% | 177.3° |
| 2030-03-24 Sun | 27 | — | unknown | 20:15–21:10 (good, 0.92 h) | 72.5° 16:00 | 8.51 | 66% | 164.2° |
| 2030-03-25 Mon | 25 | — | unknown | 20:15–21:10 (good, 0.92 h) | 72.5° 15:55 | 8.46 | 55% | 150.2° |
| 2030-03-26 Tue | 23 | — | unknown | 20:15–21:05 (good, 0.83 h) | 72.5° 15:55 | 8.41 | 44% | 136.4° |
| 2030-03-27 Wed | 21 | — | unknown | 20:20–21:00 (good, 0.67 h) | 72.5° 15:50 | 8.35 | 34% | 122.8° |
| 2030-03-28 Thu | 20 | — | unknown | 20:20–20:55 (good, 0.58 h) | 72.5° 15:45 | 8.3 | 24% | 109.5° |
| 2030-03-29 Fri | 18 | — | unknown | 20:20–20:50 (good, 0.5 h) | 72.5° 15:40 | 8.24 | 16% | 96.5° |
| 2030-03-30 Sat | 16 | — | unknown | 20:20–20:50 (good, 0.5 h) | 72.5° 15:35 | 8.19 | 9% | 83.6° |
| 2030-03-31 Sun | 13 | — | unknown | 21:25–21:45 (good, 0.33 h) | 72.5° 16:35 | 8.14 | 4% | 71.0° |
| 2030-04-01 Mon | 12 | — | unknown | 21:25–21:40 (good, 0.25 h) | 72.5° 16:30 | 8.08 | 1% | 58.5° |
| 2030-04-02 Tue | 11 | — | unknown | 21:25–21:35 (good, 0.17 h) | 72.5° 16:25 | 8.03 | 0% | 46.2° |
| 2030-04-03 Wed | 9 | — | unknown | 21:25–21:30 (good, 0.08 h) | 72.5° 16:20 | 7.97 | 1% | 34.1° |
| 2030-04-04 Thu | 7 | — | unknown | 21:30–21:55 (marginal, 0.42 h) | 72.5° 16:20 | 7.91 | 4% | 22.2° |
| 2030-04-05 Fri | 5 | — | unknown | 21:30–21:50 (marginal, 0.33 h) | 72.5° 16:15 | 7.86 | 8% | 10.4° |
| 2030-04-06 Sat | 4 | — | unknown | 21:30–21:50 (marginal, 0.33 h) | 72.5° 16:10 | 7.8 | 14% | 3.0° |
| 2030-04-07 Sun | 3 | — | unknown | 21:35–21:45 (marginal, 0.17 h) | 72.5° 16:05 | 7.75 | 21% | 13.7° |
| 2030-04-08 Mon | 2 | — | unknown | 21:35–21:40 (marginal, 0.08 h) | 72.5° 16:00 | 7.69 | 29% | 25.5° |
| 2030-04-09 Tue | 1 | — | unknown | — | 72.5° 16:00 | 7.63 | 38% | 37.4° |
| 2030-04-10 Wed | 1 | — | unknown | — | 72.5° 15:55 | 7.58 | 48% | 49.6° |
| 2030-04-11 Thu | 1 | — | unknown | — | 72.5° 15:50 | 7.52 | 58% | 62.0° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2030-03-13&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.