← 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. |
|---|---|---|---|---|---|---|---|---|
| 2038-02-21 Sun | 37 | — | unknown | 19:35–21:00 (good, 1.42 h) | 89.8° 15:00 | 10.0 | 92% | 136.0° |
| 2038-02-22 Mon | 37 | — | unknown | 19:40–21:05 (good, 1.42 h) | 89.7° 14:55 | 9.95 | 85% | 140.8° |
| 2038-02-23 Tue | 35 | — | unknown | 19:40–21:00 (good, 1.33 h) | 89.6° 14:50 | 9.91 | 76% | 141.2° |
| 2038-02-24 Wed | 33 | — | unknown | 19:40–20:55 (good, 1.25 h) | 89.5° 14:50 | 9.87 | 65% | 137.3° |
| 2038-02-25 Thu | 32 | — | unknown | 19:40–20:55 (good, 1.25 h) | 89.7° 14:45 | 9.82 | 54% | 130.3° |
| 2038-02-26 Fri | 29 | — | unknown | 19:45–20:50 (good, 1.08 h) | 89.8° 14:40 | 9.78 | 43% | 121.6° |
| 2038-02-27 Sat | 28 | — | unknown | 19:45–20:45 (good, 1.0 h) | 89.7° 14:35 | 9.73 | 32% | 112.0° |
| 2038-02-28 Sun | 26 | — | unknown | 19:45–20:40 (good, 0.92 h) | 89.5° 14:30 | 9.69 | 23% | 102.1° |
| 2038-03-01 Mon | 25 | — | unknown | 19:45–20:35 (good, 0.83 h) | 89.6° 14:30 | 9.64 | 15% | 92.1° |
| 2038-03-02 Tue | 23 | — | unknown | 19:45–20:35 (good, 0.83 h) | 89.7° 14:25 | 9.6 | 9% | 82.2° |
| 2038-03-03 Wed | 21 | — | unknown | 19:50–20:30 (good, 0.67 h) | 89.8° 14:20 | 9.55 | 4% | 72.7° |
| 2038-03-04 Thu | 20 | — | unknown | 19:50–20:25 (good, 0.58 h) | 89.7° 14:15 | 9.5 | 1% | 63.6° |
| 2038-03-05 Fri | 18 | — | unknown | 19:50–20:20 (good, 0.5 h) | 89.5° 14:10 | 9.46 | 0% | 55.2° |
| 2038-03-06 Sat | 16 | — | unknown | 19:50–20:15 (good, 0.42 h) | 89.7° 14:10 | 9.41 | 1% | 47.9° |
| 2038-03-07 Sun | 13 | — | unknown | 19:55–20:15 (good, 0.33 h) | 89.8° 14:05 | 9.36 | 4% | 42.3° |
| 2038-03-08 Mon | 12 | — | unknown | 19:55–20:05 (good, 0.17 h) | 89.7° 14:00 | 9.32 | 8% | 39.0° |
| 2038-03-09 Tue | 9 | — | unknown | 19:55–20:00 (good, 0.08 h) | 89.6° 13:55 | 9.27 | 14% | 38.5° |
| 2038-03-10 Wed | 7 | — | unknown | 19:55–20:35 (marginal, 0.67 h) | 89.5° 13:55 | 9.22 | 21% | 41.1° |
| 2038-03-11 Thu | 5 | — | unknown | 20:00–20:30 (marginal, 0.5 h) | 89.7° 13:50 | 9.17 | 29% | 46.1° |
| 2038-03-12 Fri | 4 | — | unknown | 20:00–20:25 (marginal, 0.42 h) | 89.8° 13:45 | 9.12 | 38% | 53.1° |
| 2038-03-13 Sat | 3 | — | unknown | 20:00–20:25 (marginal, 0.42 h) | 89.7° 13:40 | 9.07 | 48% | 61.3° |
| 2038-03-14 Sun | 2 | — | unknown | 20:00–20:15 (marginal, 0.25 h) | 89.6° 13:35 | 9.02 | 58% | 70.6° |
| 2038-03-15 Mon | 2 | — | unknown | 20:05–20:10 (marginal, 0.08 h) | 89.6° 13:35 | 8.97 | 68% | 80.6° |
| 2038-03-16 Tue | 1 | — | unknown | 20:05–20:10 (marginal, 0.08 h) | 89.7° 13:30 | 8.92 | 78% | 91.1° |
| 2038-03-17 Wed | 1 | — | unknown | — | 89.8° 13:25 | 8.87 | 86% | 102.0° |
| 2038-03-18 Thu | 1 | — | unknown | — | 89.7° 13:20 | 8.82 | 93% | 112.9° |
| 2038-03-19 Fri | 1 | — | unknown | — | 89.5° 13:15 | 8.77 | 98% | 123.5° |
| 2038-03-20 Sat | 1 | — | unknown | — | 89.6° 13:15 | 8.72 | 100% | 132.7° |
| 2038-03-21 Sun | 1 | — | unknown | — | 89.8° 13:10 | 8.67 | 99% | 139.3° |
| 2038-03-22 Mon | 0 | — | unknown | — | 89.8° 13:05 | 8.61 | 95% | 141.7° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2038-02-21&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.