← 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. |
|---|---|---|---|---|---|---|---|---|
| 2037-03-15 Sun | 40 | — | unknown | 20:05–21:45 (good, 1.67 h) | 42.9° 18:25 | 8.96 | 1% | 96.1° |
| 2037-03-16 Mon | 38 | — | unknown | 20:05–21:40 (good, 1.58 h) | 42.9° 18:20 | 8.91 | 0% | 85.4° |
| 2037-03-17 Tue | 36 | — | unknown | 20:05–21:35 (good, 1.5 h) | 42.9° 18:15 | 8.86 | 1% | 74.6° |
| 2037-03-18 Wed | 35 | — | unknown | 20:05–21:30 (good, 1.42 h) | 42.9° 18:10 | 8.81 | 4% | 63.9° |
| 2037-03-19 Thu | 32 | — | unknown | 20:10–21:25 (good, 1.25 h) | 42.9° 18:10 | 8.76 | 8% | 53.3° |
| 2037-03-20 Fri | 28 | — | unknown | 20:10–21:15 (good, 1.08 h) | 42.9° 18:05 | 8.7 | 14% | 43.2° |
| 2037-03-21 Sat | 23 | — | unknown | 20:10–21:05 (good, 0.92 h) | 42.9° 18:00 | 8.65 | 22% | 34.1° |
| 2037-03-22 Sun | 18 | — | unknown | 20:10–20:50 (good, 0.67 h) | 42.9° 17:55 | 8.6 | 31% | 27.3° |
| 2037-03-23 Mon | 13 | — | unknown | 20:15–21:40 (marginal, 1.42 h) | 42.9° 17:50 | 8.55 | 41% | 25.2° |
| 2037-03-24 Tue | 10 | — | unknown | 20:15–21:30 (marginal, 1.25 h) | 42.9° 17:50 | 8.5 | 52% | 29.2° |
| 2037-03-25 Wed | 7 | — | unknown | 20:15–21:15 (marginal, 1.0 h) | 42.9° 17:45 | 8.44 | 63% | 37.7° |
| 2037-03-26 Thu | 6 | — | unknown | 20:15–21:05 (marginal, 0.83 h) | 42.9° 17:40 | 8.39 | 73% | 48.8° |
| 2037-03-27 Fri | 6 | — | unknown | 20:20–21:05 (marginal, 0.75 h) | 42.9° 17:35 | 8.34 | 83% | 61.2° |
| 2037-03-28 Sat | 7 | — | unknown | 20:20–21:05 (marginal, 0.75 h) | 42.9° 17:35 | 8.28 | 91% | 74.3° |
| 2037-03-29 Sun | 8 | — | unknown | 21:20–22:10 (marginal, 0.83 h) | 42.9° 18:30 | 8.23 | 97% | 87.9° |
| 2037-03-30 Mon | 9 | — | unknown | 21:20–22:15 (marginal, 0.92 h) | 42.9° 18:25 | 8.17 | 100% | 101.6° |
| 2037-03-31 Tue | 9 | — | unknown | 20:50–22:10 (marginal, 1.33 h) | 42.9° 18:20 | 8.12 | 99% | 115.0° |
| 2037-04-01 Wed | 9 | — | unknown | 21:25–21:30 (good, 0.08 h) | 42.9° 18:15 | 8.06 | 96% | 127.7° |
| 2037-04-02 Thu | 10 | — | unknown | 21:25–21:30 (good, 0.08 h) | 42.9° 18:15 | 8.01 | 91% | 139.3° |
| 2037-04-03 Fri | 7 | — | unknown | 20:55–22:00 (marginal, 1.08 h) | 42.9° 18:10 | 7.95 | 84% | 148.8° |
| 2037-04-04 Sat | 6 | — | unknown | 21:30–21:55 (marginal, 0.42 h) | 42.9° 18:05 | 7.9 | 75% | 154.2° |
| 2037-04-05 Sun | 5 | — | unknown | 21:30–21:50 (marginal, 0.33 h) | 42.9° 18:00 | 7.84 | 65% | 153.8° |
| 2037-04-06 Mon | 4 | — | unknown | 21:30–21:45 (marginal, 0.25 h) | 42.9° 17:55 | 7.79 | 55% | 148.2° |
| 2037-04-07 Tue | 3 | — | unknown | 21:35–21:45 (marginal, 0.17 h) | 42.9° 17:55 | 7.73 | 46% | 139.8° |
| 2037-04-08 Wed | 3 | — | unknown | 21:00–21:10 (marginal, 0.17 h) | 42.9° 17:50 | 7.67 | 36% | 130.2° |
| 2037-04-09 Thu | 2 | — | unknown | 21:00–21:05 (marginal, 0.08 h) | 42.9° 17:45 | 7.62 | 27% | 120.1° |
| 2037-04-10 Fri | 1 | — | unknown | — | 42.9° 17:40 | 7.56 | 19% | 109.6° |
| 2037-04-11 Sat | 1 | — | unknown | — | 42.9° 17:40 | 7.5 | 12% | 99.0° |
| 2037-04-12 Sun | 1 | — | unknown | — | 42.9° 17:35 | 7.45 | 7% | 88.3° |
| 2037-04-13 Mon | 1 | — | unknown | — | 42.9° 17:30 | 7.39 | 3% | 77.5° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2037-03-15&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.