← 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. |
|---|---|---|---|---|---|---|---|---|
| 2030-04-01 Mon | 52 | — | unknown | 03:25–05:30 (good, 2.08 h) | 87.2° 09:40 | 8.08 | 1% | 55.2° |
| 2030-04-02 Tue | 52 | — | unknown | 03:20–05:25 (good, 2.08 h) | 87.2° 09:35 | 8.03 | 0% | 59.2° |
| 2030-04-03 Wed | 54 | — | unknown | 03:15–05:25 (good, 2.17 h) | 87.2° 09:30 | 7.97 | 1% | 64.5° |
| 2030-04-04 Thu | 56 | — | unknown | 03:10–05:25 (good, 2.25 h) | 87.2° 09:25 | 7.91 | 4% | 70.6° |
| 2030-04-05 Fri | 56 | — | unknown | 03:10–05:20 (good, 2.17 h) | 87.2° 09:25 | 7.86 | 8% | 77.3° |
| 2030-04-06 Sat | 57 | — | unknown | 03:05–05:20 (good, 2.25 h) | 87.2° 09:20 | 7.8 | 14% | 84.3° |
| 2030-04-07 Sun | 58 | — | unknown | 03:00–05:20 (good, 2.33 h) | 87.2° 09:15 | 7.75 | 21% | 91.5° |
| 2030-04-08 Mon | 58 | — | unknown | 02:55–05:15 (good, 2.33 h) | 87.2° 09:10 | 7.69 | 29% | 98.7° |
| 2030-04-09 Tue | 60 | — | unknown | 02:50–05:15 (good, 2.42 h) | 87.2° 09:05 | 7.63 | 38% | 105.7° |
| 2030-04-10 Wed | 60 | — | unknown | 02:50–05:10 (good, 2.33 h) | 87.2° 09:05 | 7.58 | 48% | 112.3° |
| 2030-04-11 Thu | 60 | — | unknown | 02:50–05:10 (good, 2.33 h) | 87.2° 09:00 | 7.52 | 58% | 118.3° |
| 2030-04-12 Fri | 61 | — | unknown | 02:45–05:10 (good, 2.42 h) | 87.2° 08:55 | 7.46 | 68% | 123.2° |
| 2030-04-13 Sat | 60 | — | unknown | 02:45–05:05 (good, 2.33 h) | 87.2° 08:50 | 7.41 | 77% | 126.5° |
| 2030-04-14 Sun | 60 | — | unknown | 02:45–05:05 (good, 2.33 h) | 87.2° 08:45 | 7.35 | 86% | 127.6° |
| 2030-04-15 Mon | 54 | — | unknown | 02:40–05:00 (good, 2.33 h) | 87.2° 08:45 | 7.29 | 93% | 126.1° |
| 2030-04-16 Tue | 53 | — | unknown | 02:40–05:00 (good, 2.33 h) | 87.2° 08:40 | 7.23 | 98% | 122.0° |
| 2030-04-17 Wed | 52 | — | unknown | 02:35–05:00 (good, 2.42 h) | 87.2° 08:35 | 7.18 | 100% | 115.8° |
| 2030-04-18 Thu | 47 | — | unknown | 02:40–04:55 (good, 2.25 h) | 87.2° 08:30 | 7.12 | 99% | 108.0° |
| 2030-04-19 Fri | 44 | — | unknown | 02:40–04:55 (good, 2.25 h) | 87.2° 08:30 | 7.06 | 95% | 99.2° |
| 2030-04-20 Sat | 41 | — | unknown | 02:40–04:50 (good, 2.17 h) | 87.2° 08:25 | 7.0 | 89% | 90.2° |
| 2030-04-21 Sun | 41 | — | unknown | 02:35–04:50 (good, 2.25 h) | 87.2° 08:20 | 6.94 | 80% | 81.2° |
| 2030-04-22 Mon | 42 | — | unknown | 02:25–04:50 (good, 2.42 h) | 87.2° 08:15 | 6.89 | 70% | 72.9° |
| 2030-04-23 Tue | 47 | — | unknown | 02:15–04:45 (good, 2.5 h) | 87.2° 08:10 | 6.83 | 59% | 65.5° |
| 2030-04-24 Wed | 56 | — | unknown | 01:55–04:45 (good, 2.83 h) | 87.2° 08:10 | 6.77 | 48% | 59.4° |
| 2030-04-25 Thu | 62 | — | unknown | 01:50–04:45 (good, 2.92 h) | 87.2° 08:05 | 6.71 | 38% | 55.1° |
| 2030-04-26 Fri | 68 | — | unknown | 01:45–04:40 (good, 2.92 h) | 87.2° 08:00 | 6.65 | 28% | 52.8° |
| 2030-04-27 Sat | 73 | — | unknown | 01:40–04:40 (good, 3.0 h) | 87.2° 07:55 | 6.59 | 20% | 52.6° |
| 2030-04-28 Sun | 77 | — | unknown | 01:35–04:35 (good, 3.0 h) | 87.2° 07:50 | 6.54 | 12% | 54.4° |
| 2030-04-29 Mon | 78 | — | unknown | 01:35–04:35 (good, 3.0 h) | 87.2° 07:50 | 6.48 | 7% | 58.0° |
| 2030-04-30 Tue | 80 | — | unknown | 01:30–04:35 (good, 3.08 h) | 87.2° 07:45 | 6.42 | 3% | 63.0° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2030-04-01&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.