← 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. |
|---|---|---|---|---|---|---|---|---|
| 2038-03-28 Sun | 19 | — | unknown | 21:20–21:55 (good, 0.58 h) | 42.9° 18:35 | 8.3 | 38% | 139.2° |
| 2038-03-29 Mon | 17 | — | unknown | 21:20–21:50 (good, 0.5 h) | 42.9° 18:30 | 8.24 | 28% | 129.3° |
| 2038-03-30 Tue | 15 | — | unknown | 21:20–21:45 (good, 0.42 h) | 42.9° 18:25 | 8.19 | 20% | 118.9° |
| 2038-03-31 Wed | 12 | — | unknown | 21:25–21:40 (good, 0.25 h) | 42.9° 18:20 | 8.13 | 12% | 108.3° |
| 2038-04-01 Thu | 11 | — | unknown | 21:25–21:35 (good, 0.17 h) | 42.9° 18:20 | 8.08 | 7% | 97.5° |
| 2038-04-02 Fri | 10 | — | unknown | 21:25–21:35 (good, 0.17 h) | 42.9° 18:15 | 8.02 | 3% | 86.9° |
| 2038-04-03 Sat | 8 | — | unknown | 21:25–21:30 (good, 0.08 h) | 42.9° 18:10 | 7.97 | 1% | 76.3° |
| 2038-04-04 Sun | 7 | — | unknown | 21:30–21:55 (marginal, 0.42 h) | 42.9° 18:05 | 7.91 | 0% | 65.9° |
| 2038-04-05 Mon | 6 | — | unknown | 21:30–21:50 (marginal, 0.33 h) | 42.9° 18:00 | 7.86 | 2% | 55.8° |
| 2038-04-06 Tue | 5 | — | unknown | 21:30–21:50 (marginal, 0.33 h) | 42.9° 18:00 | 7.8 | 5% | 46.1° |
| 2038-04-07 Wed | 3 | — | unknown | 21:35–21:45 (marginal, 0.17 h) | 42.9° 17:55 | 7.74 | 9% | 37.4° |
| 2038-04-08 Thu | 2 | — | unknown | 21:35–21:40 (marginal, 0.08 h) | 42.9° 17:50 | 7.69 | 16% | 30.5° |
| 2038-04-09 Fri | 1 | — | unknown | — | 42.9° 17:45 | 7.63 | 23% | 26.9° |
| 2038-04-10 Sat | 1 | — | unknown | — | 42.9° 17:40 | 7.57 | 32% | 28.2° |
| 2038-04-11 Sun | 1 | — | unknown | — | 42.9° 17:40 | 7.52 | 42% | 34.0° |
| 2038-04-12 Mon | 0 | — | unknown | — | 42.9° 17:35 | 7.46 | 52% | 42.8° |
| 2038-04-13 Tue | 0 | — | unknown | — | 42.9° 17:30 | 7.4 | 62% | 53.4° |
| 2038-04-14 Wed | 0 | — | unknown | — | 42.9° 17:25 | 7.35 | 73% | 65.1° |
| 2038-04-15 Thu | 0 | — | unknown | — | 42.9° 17:25 | 7.29 | 82% | 77.7° |
| 2038-04-16 Fri | 0 | — | unknown | — | 42.9° 17:20 | 7.23 | 90% | 90.7° |
| 2038-04-17 Sat | 0 | — | unknown | — | 42.9° 17:15 | 7.17 | 96% | 104.1° |
| 2038-04-18 Sun | 0 | — | unknown | — | 42.9° 17:10 | 7.11 | 99% | 117.4° |
| 2038-04-19 Mon | 0 | — | unknown | — | 42.9° 17:05 | 7.06 | 100% | 130.2° |
| 2038-04-20 Tue | 0 | — | unknown | — | 42.9° 17:05 | 7.0 | 96% | 141.7° |
| 2038-04-21 Wed | 0 | — | unknown | — | 42.9° 17:00 | 6.94 | 91% | 150.1° |
| 2038-04-22 Thu | 0 | — | unknown | — | 42.9° 16:55 | 6.88 | 83% | 153.1° |
| 2038-04-23 Fri | 0 | — | unknown | — | 42.9° 16:50 | 6.82 | 74% | 149.6° |
| 2038-04-24 Sat | 0 | — | unknown | — | 42.9° 16:45 | 6.77 | 64% | 141.7° |
| 2038-04-25 Sun | 0 | — | unknown | — | 42.9° 16:45 | 6.71 | 53% | 132.0° |
| 2038-04-26 Mon | 0 | — | unknown | — | 42.9° 16:40 | 6.65 | 43% | 121.5° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2038-03-28&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.