← 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. |
|---|---|---|---|---|---|---|---|---|
| 2030-04-18 Thu | 35 | — | unknown | 03:10–04:55 (good, 1.75 h) | 71.1° 07:35 | 7.12 | 99% | 91.1° |
| 2030-04-19 Fri | 31 | — | unknown | 03:50–04:55 (good, 1.08 h) | 71.1° 07:30 | 7.06 | 95% | 79.2° |
| 2030-04-20 Sat | 28 | — | unknown | 04:15–04:50 (good, 0.58 h) | 71.1° 07:25 | 7.0 | 89% | 67.8° |
| 2030-04-21 Sun | 28 | — | unknown | 04:15–04:50 (good, 0.58 h) | 71.1° 07:20 | 6.94 | 80% | 57.2° |
| 2030-04-22 Mon | 31 | — | unknown | 03:35–04:50 (good, 1.25 h) | 71.1° 07:20 | 6.89 | 70% | 48.2° |
| 2030-04-23 Tue | 36 | — | unknown | 02:35–04:45 (good, 2.17 h) | 71.1° 07:15 | 6.83 | 59% | 41.6° |
| 2030-04-24 Wed | 48 | — | unknown | 02:10–04:45 (good, 2.58 h) | 71.1° 07:10 | 6.77 | 48% | 38.3° |
| 2030-04-25 Thu | 55 | — | unknown | 02:05–04:45 (good, 2.67 h) | 71.1° 07:05 | 6.71 | 38% | 38.9° |
| 2030-04-26 Fri | 61 | — | unknown | 02:00–04:40 (good, 2.67 h) | 71.1° 07:00 | 6.65 | 28% | 42.9° |
| 2030-04-27 Sat | 67 | — | unknown | 01:55–04:40 (good, 2.75 h) | 71.1° 07:00 | 6.59 | 20% | 49.3° |
| 2030-04-28 Sun | 71 | — | unknown | 01:55–04:35 (good, 2.67 h) | 71.1° 06:55 | 6.54 | 12% | 57.2° |
| 2030-04-29 Mon | 73 | — | unknown | 01:50–04:35 (good, 2.75 h) | 71.1° 06:50 | 6.48 | 7% | 65.9° |
| 2030-04-30 Tue | 74 | — | unknown | 01:45–04:35 (good, 2.83 h) | 71.1° 06:45 | 6.42 | 3% | 75.1° |
| 2030-05-01 Wed | 74 | — | unknown | 01:40–04:30 (good, 2.83 h) | 71.1° 06:45 | 6.36 | 0% | 84.4° |
| 2030-05-02 Thu | 76 | — | unknown | 01:35–04:30 (good, 2.92 h) | 71.1° 06:40 | 6.3 | 0% | 93.7° |
| 2030-05-03 Fri | 78 | — | unknown | 01:35–04:30 (good, 2.92 h) | 71.1° 06:35 | 6.25 | 2% | 103.0° |
| 2030-05-04 Sat | 78 | — | unknown | 01:30–04:25 (good, 2.92 h) | 71.1° 06:30 | 6.19 | 5% | 112.0° |
| 2030-05-05 Sun | 79 | — | unknown | 01:25–04:25 (good, 3.0 h) | 71.1° 06:25 | 6.13 | 10% | 120.6° |
| 2030-05-06 Mon | 80 | — | unknown | 01:20–04:20 (good, 3.0 h) | 71.1° 06:25 | 6.07 | 16% | 128.5° |
| 2030-05-07 Tue | 82 | — | unknown | 01:20–04:20 (good, 3.0 h) | 71.1° 06:20 | 6.02 | 24% | 135.2° |
| 2030-05-08 Wed | 83 | — | unknown | 01:15–04:20 (good, 3.08 h) | 71.1° 06:15 | 5.96 | 32% | 140.0° |
| 2030-05-09 Thu | 83 | — | unknown | 01:15–04:15 (good, 3.0 h) | 71.1° 06:10 | 5.9 | 42% | 142.0° |
| 2030-05-10 Fri | 84 | — | unknown | 01:10–04:15 (good, 3.08 h) | 71.1° 06:05 | 5.85 | 52% | 140.6° |
| 2030-05-11 Sat | 84 | — | unknown | 01:10–04:15 (good, 3.08 h) | 71.1° 06:05 | 5.79 | 63% | 135.8° |
| 2030-05-12 Sun | 84 | — | unknown | 01:05–04:10 (good, 3.08 h) | 71.1° 06:00 | 5.74 | 73% | 128.3° |
| 2030-05-13 Mon | 84 | — | unknown | 01:05–04:10 (good, 3.08 h) | 71.1° 05:55 | 5.68 | 82% | 118.8° |
| 2030-05-14 Tue | 70 | — | unknown | 01:05–04:10 (good, 3.08 h) | 71.1° 05:50 | 5.63 | 90% | 108.1° |
| 2030-05-15 Wed | 59 | — | unknown | 01:10–04:05 (good, 2.92 h) | 71.1° 05:50 | 5.58 | 96% | 96.5° |
| 2030-05-16 Thu | 50 | — | unknown | 01:50–04:05 (good, 2.25 h) | 71.1° 05:45 | 5.52 | 100% | 84.6° |
| 2030-05-17 Fri | 42 | — | unknown | 02:45–04:05 (good, 1.33 h) | 71.1° 05:40 | 5.47 | 100% | 72.7° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2030-04-18&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.