← 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. |
|---|---|---|---|---|---|---|---|---|
| 2037-02-18 Wed | 39 | — | unknown | 19:35–21:20 (good, 1.75 h) | 89.8° 15:10 | 10.11 | 12% | 41.2° |
| 2037-02-19 Thu | 34 | — | unknown | 19:35–21:05 (good, 1.5 h) | 89.6° 15:05 | 10.07 | 19% | 38.7° |
| 2037-02-20 Fri | 29 | — | unknown | 19:35–20:55 (good, 1.33 h) | 89.5° 15:05 | 10.03 | 27% | 39.2° |
| 2037-02-21 Sat | 24 | — | unknown | 19:35–20:45 (good, 1.17 h) | 89.7° 15:00 | 9.98 | 36% | 42.9° |
| 2037-02-22 Sun | 19 | — | unknown | 19:40–20:05 (good, 0.42 h) | 89.8° 14:55 | 9.94 | 46% | 49.2° |
| 2037-02-23 Mon | 16 | — | unknown | 19:40–21:30 (marginal, 1.83 h) | 89.7° 14:50 | 9.9 | 57% | 57.3° |
| 2037-02-24 Tue | 14 | — | unknown | 19:40–21:20 (marginal, 1.67 h) | 89.6° 14:45 | 9.86 | 68% | 66.9° |
| 2037-02-25 Wed | 13 | — | unknown | 19:40–21:15 (marginal, 1.58 h) | 89.6° 14:45 | 9.81 | 78% | 77.4° |
| 2037-02-26 Thu | 14 | — | unknown | 19:45–21:15 (marginal, 1.5 h) | 89.7° 14:40 | 9.77 | 86% | 88.6° |
| 2037-02-27 Fri | 15 | — | unknown | 19:45–20:10 (good, 0.42 h) | 89.8° 14:35 | 9.72 | 94% | 100.2° |
| 2037-02-28 Sat | 18 | — | unknown | 19:45–20:20 (good, 0.58 h) | 89.7° 14:30 | 9.68 | 98% | 111.7° |
| 2037-03-01 Sun | 19 | — | unknown | 19:45–20:25 (good, 0.67 h) | 89.5° 14:25 | 9.63 | 100% | 122.6° |
| 2037-03-02 Mon | 18 | — | unknown | 19:50–20:20 (good, 0.5 h) | 89.6° 14:25 | 9.59 | 99% | 132.0° |
| 2037-03-03 Tue | 20 | — | unknown | 19:50–20:20 (good, 0.5 h) | 89.7° 14:20 | 9.54 | 94% | 138.7° |
| 2037-03-04 Wed | 19 | — | unknown | 19:50–20:25 (good, 0.58 h) | 89.8° 14:15 | 9.49 | 88% | 141.5° |
| 2037-03-05 Thu | 18 | — | unknown | 19:50–20:20 (good, 0.5 h) | 89.6° 14:10 | 9.45 | 79% | 139.8° |
| 2037-03-06 Fri | 16 | — | unknown | 19:50–20:15 (good, 0.42 h) | 89.5° 14:10 | 9.4 | 69% | 134.4° |
| 2037-03-07 Sat | 13 | — | unknown | 19:55–20:10 (good, 0.25 h) | 89.7° 14:05 | 9.35 | 59% | 126.9° |
| 2037-03-08 Sun | 12 | — | unknown | 19:55–20:10 (good, 0.25 h) | 89.8° 14:00 | 9.3 | 49% | 118.2° |
| 2037-03-09 Mon | 10 | — | unknown | 19:55–20:05 (good, 0.17 h) | 89.7° 13:55 | 9.26 | 39% | 109.0° |
| 2037-03-10 Tue | 9 | — | unknown | 19:55–20:00 (good, 0.08 h) | 89.6° 13:50 | 9.21 | 29% | 99.6° |
| 2037-03-11 Wed | 7 | — | unknown | 20:00–20:30 (marginal, 0.5 h) | 89.5° 13:50 | 9.16 | 21% | 90.2° |
| 2037-03-12 Thu | 6 | — | unknown | 20:00–20:25 (marginal, 0.42 h) | 89.7° 13:45 | 9.11 | 14% | 80.9° |
| 2037-03-13 Fri | 5 | — | unknown | 20:00–20:20 (marginal, 0.33 h) | 89.8° 13:40 | 9.06 | 8% | 71.8° |
| 2037-03-14 Sat | 5 | — | unknown | 20:00–20:20 (marginal, 0.33 h) | 89.7° 13:35 | 9.01 | 4% | 63.0° |
| 2037-03-15 Sun | 3 | — | unknown | 20:05–20:15 (marginal, 0.17 h) | 89.5° 13:30 | 8.96 | 1% | 54.9° |
| 2037-03-16 Mon | 3 | — | unknown | 20:05–20:10 (marginal, 0.08 h) | 89.6° 13:30 | 8.91 | 0% | 47.8° |
| 2037-03-17 Tue | 1 | — | unknown | — | 89.7° 13:25 | 8.86 | 1% | 42.2° |
| 2037-03-18 Wed | 1 | — | unknown | — | 89.8° 13:20 | 8.81 | 4% | 38.9° |
| 2037-03-19 Thu | 1 | — | unknown | — | 89.7° 13:15 | 8.76 | 8% | 38.7° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2037-02-18&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.