← 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. |
|---|---|---|---|---|---|---|---|---|
| 2028-03-17 Fri | 36 | — | unknown | 20:05–21:35 (good, 1.5 h) | 42.9° 18:15 | 8.85 | 50% | 148.2° |
| 2028-03-18 Sat | 34 | — | unknown | 20:05–21:30 (good, 1.42 h) | 42.9° 18:10 | 8.8 | 41% | 145.5° |
| 2028-03-19 Sun | 32 | — | unknown | 20:10–21:25 (good, 1.25 h) | 42.9° 18:05 | 8.75 | 31% | 139.6° |
| 2028-03-20 Mon | 31 | — | unknown | 20:10–21:20 (good, 1.17 h) | 42.9° 18:05 | 8.7 | 23% | 131.9° |
| 2028-03-21 Tue | 29 | — | unknown | 20:10–21:20 (good, 1.17 h) | 42.9° 18:00 | 8.64 | 16% | 123.0° |
| 2028-03-22 Wed | 28 | — | unknown | 20:10–21:15 (good, 1.08 h) | 42.9° 17:55 | 8.59 | 9% | 113.5° |
| 2028-03-23 Thu | 26 | — | unknown | 20:15–21:10 (good, 0.92 h) | 42.9° 17:50 | 8.54 | 5% | 103.7° |
| 2028-03-24 Fri | 24 | — | unknown | 20:15–21:05 (good, 0.83 h) | 42.9° 17:45 | 8.49 | 2% | 93.7° |
| 2028-03-25 Sat | 23 | — | unknown | 20:15–21:00 (good, 0.75 h) | 42.9° 17:45 | 8.43 | 0% | 83.5° |
| 2028-03-26 Sun | 22 | — | unknown | 21:15–22:00 (good, 0.75 h) | 42.9° 18:40 | 8.38 | 1% | 73.2° |
| 2028-03-27 Mon | 19 | — | unknown | 21:20–21:55 (good, 0.58 h) | 42.9° 18:35 | 8.33 | 3% | 63.1° |
| 2028-03-28 Tue | 16 | — | unknown | 21:20–21:50 (good, 0.5 h) | 42.9° 18:30 | 8.27 | 7% | 53.4° |
| 2028-03-29 Wed | 14 | — | unknown | 21:20–21:40 (good, 0.33 h) | 42.9° 18:25 | 8.22 | 13% | 44.4° |
| 2028-03-30 Thu | 10 | — | unknown | 21:25–21:30 (good, 0.08 h) | 42.9° 18:25 | 8.16 | 21% | 36.9° |
| 2028-03-31 Fri | 8 | — | unknown | 21:25–22:10 (marginal, 0.75 h) | 42.9° 18:20 | 8.11 | 30% | 32.3° |
| 2028-04-01 Sat | 5 | — | unknown | 21:25–22:05 (marginal, 0.67 h) | 42.9° 18:15 | 8.05 | 40% | 32.1° |
| 2028-04-02 Sun | 4 | — | unknown | 21:25–21:50 (marginal, 0.42 h) | 42.9° 18:10 | 8.0 | 51% | 36.8° |
| 2028-04-03 Mon | 2 | — | unknown | 21:30–21:40 (marginal, 0.17 h) | 42.9° 18:10 | 7.94 | 63% | 45.0° |
| 2028-04-04 Tue | 2 | — | unknown | 21:30–21:35 (marginal, 0.08 h) | 42.9° 18:05 | 7.89 | 73% | 55.4° |
| 2028-04-05 Wed | 2 | — | unknown | 21:30–21:35 (marginal, 0.08 h) | 42.9° 18:00 | 7.83 | 83% | 67.0° |
| 2028-04-06 Thu | 2 | — | unknown | 21:30–21:35 (marginal, 0.08 h) | 42.9° 17:55 | 7.78 | 91% | 79.4° |
| 2028-04-07 Fri | 2 | — | unknown | 21:35–21:40 (marginal, 0.08 h) | 42.9° 17:50 | 7.72 | 97% | 92.1° |
| 2028-04-08 Sat | 2 | — | unknown | 21:35–21:40 (marginal, 0.08 h) | 42.9° 17:50 | 7.66 | 100% | 104.7° |
| 2028-04-09 Sun | 1 | — | unknown | — | 42.9° 17:45 | 7.61 | 100% | 116.9° |
| 2028-04-10 Mon | 1 | — | unknown | — | 42.9° 17:40 | 7.55 | 97% | 128.2° |
| 2028-04-11 Tue | 1 | — | unknown | — | 42.9° 17:35 | 7.49 | 92% | 137.9° |
| 2028-04-12 Wed | 1 | — | unknown | — | 42.9° 17:30 | 7.44 | 85% | 145.1° |
| 2028-04-13 Thu | 1 | — | unknown | — | 42.9° 17:30 | 7.38 | 76% | 148.4° |
| 2028-04-14 Fri | 0 | — | unknown | — | 42.9° 17:25 | 7.32 | 67% | 147.1° |
| 2028-04-15 Sat | 0 | — | unknown | — | 42.9° 17:20 | 7.26 | 57% | 142.0° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2028-03-17&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.