← 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. |
|---|---|---|---|---|---|---|---|---|
| 2038-02-27 Sat | 33 | — | unknown | 19:45–21:00 (good, 1.25 h) | 79.2° 15:25 | 9.73 | 32% | 120.6° |
| 2038-02-28 Sun | 31 | — | unknown | 19:45–20:55 (good, 1.17 h) | 79.2° 15:25 | 9.69 | 23% | 108.9° |
| 2038-03-01 Mon | 29 | — | unknown | 19:45–20:50 (good, 1.08 h) | 79.2° 15:20 | 9.64 | 15% | 97.3° |
| 2038-03-02 Tue | 28 | — | unknown | 19:45–20:50 (good, 1.08 h) | 79.2° 15:15 | 9.6 | 9% | 85.8° |
| 2038-03-03 Wed | 26 | — | unknown | 19:50–20:45 (good, 0.92 h) | 79.2° 15:10 | 9.55 | 4% | 74.5° |
| 2038-03-04 Thu | 24 | — | unknown | 19:50–20:40 (good, 0.83 h) | 79.2° 15:05 | 9.5 | 1% | 63.5° |
| 2038-03-05 Fri | 22 | — | unknown | 19:50–20:35 (good, 0.75 h) | 79.2° 15:05 | 9.46 | 0% | 52.9° |
| 2038-03-06 Sat | 21 | — | unknown | 19:50–20:30 (good, 0.67 h) | 79.2° 15:00 | 9.41 | 1% | 42.9° |
| 2038-03-07 Sun | 19 | — | unknown | 19:55–20:30 (good, 0.58 h) | 79.2° 14:55 | 9.36 | 4% | 34.1° |
| 2038-03-08 Mon | 17 | — | unknown | 19:55–20:20 (good, 0.42 h) | 79.2° 14:50 | 9.32 | 8% | 27.3° |
| 2038-03-09 Tue | 13 | — | unknown | 19:55–20:15 (good, 0.33 h) | 79.2° 14:50 | 9.27 | 14% | 24.3° |
| 2038-03-10 Wed | 11 | — | unknown | 19:55–20:05 (good, 0.17 h) | 79.2° 14:45 | 9.22 | 21% | 26.4° |
| 2038-03-11 Thu | 7 | — | unknown | 20:00–20:40 (marginal, 0.67 h) | 79.2° 14:40 | 9.17 | 29% | 32.7° |
| 2038-03-12 Fri | 6 | — | unknown | 20:00–20:35 (marginal, 0.58 h) | 79.2° 14:35 | 9.12 | 38% | 41.5° |
| 2038-03-13 Sat | 4 | — | unknown | 20:00–20:30 (marginal, 0.5 h) | 79.2° 14:30 | 9.07 | 48% | 51.6° |
| 2038-03-14 Sun | 3 | — | unknown | 20:00–20:25 (marginal, 0.42 h) | 79.2° 14:30 | 9.02 | 58% | 62.6° |
| 2038-03-15 Mon | 2 | — | unknown | 20:05–20:20 (marginal, 0.25 h) | 79.2° 14:25 | 8.97 | 68% | 74.2° |
| 2038-03-16 Tue | 2 | — | unknown | 20:05–20:15 (marginal, 0.17 h) | 79.2° 14:20 | 8.92 | 78% | 86.5° |
| 2038-03-17 Wed | 2 | — | unknown | 20:05–20:20 (marginal, 0.25 h) | 79.2° 14:15 | 8.87 | 86% | 99.2° |
| 2038-03-18 Thu | 2 | — | unknown | 20:05–20:15 (marginal, 0.17 h) | 79.2° 14:10 | 8.82 | 93% | 112.3° |
| 2038-03-19 Fri | 1 | — | unknown | — | 79.2° 14:10 | 8.77 | 98% | 125.4° |
| 2038-03-20 Sat | 1 | — | unknown | — | 79.2° 14:05 | 8.72 | 100% | 137.9° |
| 2038-03-21 Sun | 1 | — | unknown | — | 79.2° 14:00 | 8.67 | 99% | 148.8° |
| 2038-03-22 Mon | 1 | — | unknown | — | 79.2° 13:55 | 8.61 | 95% | 155.3° |
| 2038-03-23 Tue | 1 | — | unknown | — | 79.2° 13:55 | 8.56 | 88% | 154.0° |
| 2038-03-24 Wed | 0 | — | unknown | — | 79.2° 13:50 | 8.51 | 79% | 146.1° |
| 2038-03-25 Thu | 0 | — | unknown | — | 79.2° 13:45 | 8.46 | 69% | 135.4° |
| 2038-03-26 Fri | 0 | — | unknown | — | 79.2° 13:40 | 8.4 | 59% | 123.7° |
| 2038-03-27 Sat | 0 | — | unknown | — | 79.2° 13:35 | 8.35 | 48% | 111.9° |
| 2038-03-28 Sun | 0 | — | unknown | — | 79.2° 14:35 | 8.3 | 38% | 100.1° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2038-02-27&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.