← 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. |
|---|---|---|---|---|---|---|---|---|
| 2028-02-21 Mon | 14 | — | unknown | 05:15–05:35 (good, 0.33 h) | 71.1° 10:15 | 10.02 | 10% | 44.6° |
| 2028-02-22 Tue | 15 | — | unknown | 05:10–05:35 (good, 0.42 h) | 71.1° 10:10 | 9.98 | 6% | 41.8° |
| 2028-02-23 Wed | 17 | — | unknown | 05:05–05:35 (good, 0.5 h) | 71.1° 10:10 | 9.93 | 2% | 41.6° |
| 2028-02-24 Thu | 18 | — | unknown | 05:05–05:35 (good, 0.5 h) | 71.1° 10:05 | 9.89 | 0% | 44.2° |
| 2028-02-25 Fri | 18 | — | unknown | 05:00–05:30 (good, 0.5 h) | 71.1° 10:00 | 9.85 | 0% | 49.0° |
| 2028-02-26 Sat | 19 | — | unknown | 04:55–05:30 (good, 0.58 h) | 71.1° 09:55 | 9.8 | 2% | 55.4° |
| 2028-02-27 Sun | 20 | — | unknown | 04:50–05:30 (good, 0.67 h) | 71.1° 09:50 | 9.76 | 6% | 63.0° |
| 2028-02-28 Mon | 20 | — | unknown | 04:45–05:25 (good, 0.67 h) | 71.1° 09:50 | 9.71 | 11% | 71.4° |
| 2028-02-29 Tue | 22 | — | unknown | 04:45–05:25 (good, 0.67 h) | 71.1° 09:45 | 9.67 | 18% | 80.4° |
| 2028-03-01 Wed | 22 | — | unknown | 04:40–05:25 (good, 0.75 h) | 71.1° 09:40 | 9.62 | 26% | 89.6° |
| 2028-03-02 Thu | 23 | — | unknown | 04:35–05:25 (good, 0.83 h) | 71.1° 09:35 | 9.58 | 35% | 99.1° |
| 2028-03-03 Fri | 24 | — | unknown | 04:30–05:20 (good, 0.83 h) | 71.1° 09:35 | 9.53 | 45% | 108.6° |
| 2028-03-04 Sat | 24 | — | unknown | 04:25–05:20 (good, 0.92 h) | 71.1° 09:30 | 9.48 | 56% | 117.8° |
| 2028-03-05 Sun | 26 | — | unknown | 04:25–05:20 (good, 0.92 h) | 71.1° 09:25 | 9.44 | 67% | 126.4° |
| 2028-03-06 Mon | 26 | — | unknown | 04:20–05:15 (good, 0.92 h) | 71.1° 09:20 | 9.39 | 77% | 133.5° |
| 2028-03-07 Tue | 25 | — | unknown | 04:20–05:15 (good, 0.92 h) | 71.1° 09:15 | 9.34 | 86% | 137.9° |
| 2028-03-08 Wed | 24 | — | unknown | 04:20–05:15 (good, 0.92 h) | 71.1° 09:15 | 9.29 | 93% | 138.4° |
| 2028-03-09 Thu | 23 | — | unknown | 04:15–05:10 (good, 0.92 h) | 71.1° 09:10 | 9.25 | 98% | 134.6° |
| 2028-03-10 Fri | 24 | — | unknown | 04:15–05:10 (good, 0.92 h) | 71.1° 09:05 | 9.2 | 100% | 127.3° |
| 2028-03-11 Sat | 23 | — | unknown | 04:10–05:05 (good, 0.92 h) | 71.1° 09:00 | 9.15 | 99% | 118.0° |
| 2028-03-12 Sun | 21 | — | unknown | 04:15–05:05 (good, 0.83 h) | 71.1° 08:55 | 9.1 | 95% | 107.6° |
| 2028-03-13 Mon | 20 | — | unknown | 04:15–05:05 (good, 0.83 h) | 71.1° 08:55 | 9.05 | 88% | 97.0° |
| 2028-03-14 Tue | 19 | — | unknown | 04:10–05:00 (good, 0.83 h) | 71.1° 08:50 | 9.0 | 80% | 86.4° |
| 2028-03-15 Wed | 20 | — | unknown | 04:10–05:00 (good, 0.83 h) | 71.1° 08:45 | 8.95 | 70% | 76.4° |
| 2028-03-16 Thu | 21 | — | unknown | 04:00–05:00 (good, 1.0 h) | 71.1° 08:40 | 8.9 | 60% | 67.0° |
| 2028-03-17 Fri | 22 | — | unknown | 03:55–04:55 (good, 1.0 h) | 71.1° 08:40 | 8.85 | 50% | 58.5° |
| 2028-03-18 Sat | 25 | — | unknown | 03:45–04:55 (good, 1.17 h) | 71.1° 08:35 | 8.8 | 41% | 51.2° |
| 2028-03-19 Sun | 29 | — | unknown | 03:30–04:55 (good, 1.42 h) | 71.1° 08:30 | 8.75 | 31% | 45.6° |
| 2028-03-20 Mon | 34 | — | unknown | 03:25–04:50 (good, 1.42 h) | 71.1° 08:25 | 8.7 | 23% | 42.2° |
| 2028-03-21 Tue | 37 | — | unknown | 03:20–04:50 (good, 1.5 h) | 71.1° 08:20 | 8.64 | 16% | 41.3° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2028-02-21&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.