← 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. |
|---|---|---|---|---|---|---|---|---|
| 2037-03-18 Wed | 37 | — | unknown | 20:05–21:35 (good, 1.5 h) | 72.5° 16:25 | 8.81 | 4% | 40.5° |
| 2037-03-19 Thu | 33 | — | unknown | 20:10–21:30 (good, 1.33 h) | 72.5° 16:20 | 8.76 | 8% | 28.8° |
| 2037-03-20 Fri | 29 | — | unknown | 20:10–21:20 (good, 1.17 h) | 72.5° 16:15 | 8.7 | 14% | 17.5° |
| 2037-03-21 Sat | 24 | — | unknown | 20:10–21:10 (good, 1.0 h) | 72.5° 16:10 | 8.65 | 22% | 9.2° |
| 2037-03-22 Sun | 19 | — | unknown | 20:10–21:00 (good, 0.83 h) | 72.5° 16:10 | 8.6 | 31% | 13.3° |
| 2037-03-23 Mon | 14 | — | unknown | 20:15–21:40 (marginal, 1.42 h) | 72.5° 16:05 | 8.55 | 41% | 24.6° |
| 2037-03-24 Tue | 11 | — | unknown | 20:15–21:30 (marginal, 1.25 h) | 72.5° 16:00 | 8.5 | 52% | 37.4° |
| 2037-03-25 Wed | 9 | — | unknown | 20:15–21:25 (marginal, 1.17 h) | 72.5° 15:55 | 8.44 | 63% | 50.8° |
| 2037-03-26 Thu | 9 | — | unknown | 20:15–21:20 (marginal, 1.08 h) | 72.5° 15:50 | 8.39 | 73% | 64.7° |
| 2037-03-27 Fri | 9 | — | unknown | 20:20–21:20 (marginal, 1.0 h) | 72.5° 15:50 | 8.34 | 83% | 79.1° |
| 2037-03-28 Sat | 10 | — | unknown | 20:20–21:20 (marginal, 1.0 h) | 72.5° 15:45 | 8.28 | 91% | 93.7° |
| 2037-03-29 Sun | 12 | — | unknown | 21:20–21:30 (good, 0.17 h) | 72.5° 16:40 | 8.23 | 97% | 108.6° |
| 2037-03-30 Mon | 13 | — | unknown | 21:20–21:35 (good, 0.25 h) | 72.5° 16:35 | 8.17 | 100% | 123.5° |
| 2037-03-31 Tue | 11 | — | unknown | 21:25–21:35 (good, 0.17 h) | 72.5° 16:35 | 8.12 | 99% | 138.2° |
| 2037-04-01 Wed | 10 | — | unknown | 21:25–21:30 (good, 0.08 h) | 72.5° 16:30 | 8.06 | 96% | 152.4° |
| 2037-04-02 Thu | 11 | — | unknown | 21:25–21:35 (good, 0.17 h) | 72.5° 16:25 | 8.01 | 91% | 165.3° |
| 2037-04-03 Fri | 8 | — | unknown | 20:55–22:00 (marginal, 1.08 h) | 72.5° 16:20 | 7.95 | 84% | 171.0° |
| 2037-04-04 Sat | 7 | — | unknown | 20:55–21:55 (marginal, 1.0 h) | 72.5° 16:15 | 7.9 | 75% | 162.3° |
| 2037-04-05 Sun | 6 | — | unknown | 20:55–21:25 (marginal, 0.5 h) | 72.5° 16:15 | 7.84 | 65% | 150.3° |
| 2037-04-06 Mon | 5 | — | unknown | 20:55–21:20 (marginal, 0.42 h) | 72.5° 16:10 | 7.79 | 55% | 138.1° |
| 2037-04-07 Tue | 3 | — | unknown | 21:00–21:15 (marginal, 0.25 h) | 72.5° 16:05 | 7.73 | 46% | 126.0° |
| 2037-04-08 Wed | 3 | — | unknown | 21:00–21:10 (marginal, 0.17 h) | 72.5° 16:00 | 7.67 | 36% | 114.1° |
| 2037-04-09 Thu | 2 | — | unknown | 21:00–21:10 (marginal, 0.17 h) | 72.5° 15:55 | 7.62 | 27% | 102.4° |
| 2037-04-10 Fri | 1 | — | unknown | 21:00–21:05 (marginal, 0.08 h) | 72.5° 15:55 | 7.56 | 19% | 90.7° |
| 2037-04-11 Sat | 1 | — | unknown | — | 72.5° 15:50 | 7.5 | 12% | 79.0° |
| 2037-04-12 Sun | 1 | — | unknown | — | 72.5° 15:45 | 7.45 | 7% | 67.3° |
| 2037-04-13 Mon | 1 | — | unknown | — | 72.5° 15:40 | 7.39 | 3% | 55.5° |
| 2037-04-14 Tue | 1 | — | unknown | — | 72.5° 15:40 | 7.33 | 1% | 43.7° |
| 2037-04-15 Wed | 0 | — | unknown | — | 72.5° 15:35 | 7.27 | 0% | 31.9° |
| 2037-04-16 Thu | 0 | — | unknown | — | 72.5° 15:30 | 7.22 | 2% | 20.2° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2037-03-18&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.