← 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. |
|---|---|---|---|---|---|---|---|---|
| 2036-05-25 Sun | 12 | — | unknown | 03:45–03:50 (good, 0.08 h) | 89.6° 09:50 | 5.06 | 0% | 53.1° |
| 2036-05-26 Mon | 13 | — | unknown | 03:40–03:50 (good, 0.17 h) | 89.7° 09:45 | 5.01 | 2% | 63.1° |
| 2036-05-27 Tue | 14 | — | unknown | 03:35–03:50 (good, 0.25 h) | 89.8° 09:40 | 4.97 | 6% | 74.0° |
| 2036-05-28 Wed | 15 | — | unknown | 03:30–03:50 (good, 0.33 h) | 89.7° 09:35 | 4.93 | 13% | 85.4° |
| 2036-05-29 Thu | 16 | — | unknown | 03:30–03:50 (good, 0.33 h) | 89.5° 09:30 | 4.89 | 22% | 96.9° |
| 2036-05-30 Fri | 17 | — | unknown | 03:25–03:45 (good, 0.33 h) | 89.6° 09:30 | 4.85 | 33% | 108.1° |
| 2036-05-31 Sat | 18 | — | unknown | 03:20–03:45 (good, 0.42 h) | 89.8° 09:25 | 4.81 | 44% | 118.6° |
| 2036-06-01 Sun | 19 | — | unknown | 03:15–03:45 (good, 0.5 h) | 89.8° 09:20 | 4.78 | 55% | 128.0° |
| 2036-06-02 Mon | 21 | — | unknown | 03:15–03:45 (good, 0.5 h) | 89.6° 09:15 | 4.74 | 66% | 135.6° |
| 2036-06-03 Tue | 22 | — | unknown | 03:15–03:45 (good, 0.5 h) | 89.5° 09:15 | 4.71 | 76% | 140.5° |
| 2036-06-04 Wed | 21 | — | unknown | 03:15–03:40 (good, 0.42 h) | 89.7° 09:10 | 4.68 | 84% | 141.9° |
| 2036-06-05 Thu | 21 | — | unknown | 03:10–03:40 (good, 0.5 h) | 89.8° 09:05 | 4.65 | 91% | 139.6° |
| 2036-06-06 Fri | 21 | — | unknown | 03:10–03:40 (good, 0.5 h) | 89.7° 09:00 | 4.62 | 96% | 134.2° |
| 2036-06-07 Sat | 21 | — | unknown | 03:05–03:40 (good, 0.58 h) | 89.6° 08:55 | 4.59 | 99% | 126.9° |
| 2036-06-08 Sun | 22 | — | unknown | 03:00–03:40 (good, 0.67 h) | 89.6° 08:55 | 4.57 | 100% | 118.5° |
| 2036-06-09 Mon | 20 | — | unknown | 03:05–03:40 (good, 0.58 h) | 89.7° 08:50 | 4.54 | 99% | 109.5° |
| 2036-06-10 Tue | 19 | — | unknown | 03:05–03:40 (good, 0.58 h) | 89.8° 08:45 | 4.52 | 96% | 100.2° |
| 2036-06-11 Wed | 18 | — | unknown | 03:10–03:40 (good, 0.5 h) | 89.7° 08:40 | 4.5 | 91% | 90.8° |
| 2036-06-12 Thu | 18 | — | unknown | 03:25–03:40 (good, 0.25 h) | 89.5° 08:35 | 4.49 | 85% | 81.5° |
| 2036-06-13 Fri | 18 | — | unknown | 03:35–03:40 (good, 0.08 h) | 89.6° 08:35 | 4.47 | 78% | 72.3° |
| 2036-06-14 Sat | 19 | — | unknown | 03:25–03:40 (good, 0.25 h) | 89.8° 08:30 | 4.46 | 70% | 63.5° |
| 2036-06-15 Sun | 21 | — | unknown | 02:50–03:40 (good, 0.83 h) | 89.8° 08:25 | 4.45 | 61% | 55.2° |
| 2036-06-16 Mon | 24 | — | unknown | 02:40–03:40 (good, 1.0 h) | 89.6° 08:20 | 4.44 | 51% | 47.8° |
| 2036-06-17 Tue | 28 | — | unknown | 02:30–03:40 (good, 1.17 h) | 89.5° 08:20 | 4.43 | 41% | 41.9° |
| 2036-06-18 Wed | 36 | — | unknown | 02:10–03:40 (good, 1.5 h) | 89.7° 08:15 | 4.43 | 31% | 38.6° |
| 2036-06-19 Thu | 40 | — | unknown | 02:05–03:40 (good, 1.58 h) | 89.8° 08:10 | 4.42 | 22% | 38.7° |
| 2036-06-20 Fri | 44 | — | unknown | 02:00–03:40 (good, 1.67 h) | 89.7° 08:05 | 4.42 | 14% | 42.5° |
| 2036-06-21 Sat | 46 | — | unknown | 02:00–03:40 (good, 1.67 h) | 89.6° 08:00 | 4.42 | 7% | 49.6° |
| 2036-06-22 Sun | 48 | — | unknown | 01:55–03:40 (good, 1.75 h) | 89.6° 08:00 | 4.43 | 2% | 58.8° |
| 2036-06-23 Mon | 50 | — | unknown | 01:50–03:40 (good, 1.83 h) | 89.7° 07:55 | 4.43 | 0% | 69.5° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2036-05-25&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.