← 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. |
|---|---|---|---|---|---|---|---|---|
| 2036-03-23 Sun | 26 | — | unknown | 20:15–21:10 (good, 0.92 h) | 42.9° 17:50 | 8.54 | 14% | 119.7° |
| 2036-03-24 Mon | 24 | — | unknown | 20:15–21:05 (good, 0.83 h) | 42.9° 17:45 | 8.48 | 8% | 108.9° |
| 2036-03-25 Tue | 23 | — | unknown | 20:15–21:05 (good, 0.83 h) | 42.9° 17:45 | 8.43 | 4% | 97.7° |
| 2036-03-26 Wed | 22 | — | unknown | 20:15–21:00 (good, 0.75 h) | 42.9° 17:40 | 8.38 | 1% | 86.3° |
| 2036-03-27 Thu | 19 | — | unknown | 20:20–20:55 (good, 0.58 h) | 42.9° 17:35 | 8.32 | 0% | 74.7° |
| 2036-03-28 Fri | 17 | — | unknown | 20:20–20:50 (good, 0.5 h) | 42.9° 17:30 | 8.27 | 1% | 63.0° |
| 2036-03-29 Sat | 16 | — | unknown | 20:20–20:45 (good, 0.42 h) | 42.9° 17:30 | 8.21 | 5% | 51.4° |
| 2036-03-30 Sun | 12 | — | unknown | 21:25–21:40 (good, 0.25 h) | 42.9° 18:25 | 8.16 | 10% | 40.4° |
| 2036-03-31 Mon | 10 | — | unknown | 21:25–21:30 (good, 0.08 h) | 42.9° 18:20 | 8.11 | 18% | 30.9° |
| 2036-04-01 Tue | 7 | — | unknown | 21:25–22:05 (marginal, 0.67 h) | 42.9° 18:15 | 8.05 | 27% | 24.8° |
| 2036-04-02 Wed | 5 | — | unknown | 21:25–22:00 (marginal, 0.58 h) | 42.9° 18:10 | 8.0 | 38% | 25.3° |
| 2036-04-03 Thu | 3 | — | unknown | 21:30–21:50 (marginal, 0.33 h) | 42.9° 18:10 | 7.94 | 49% | 32.1° |
| 2036-04-04 Fri | 2 | — | unknown | 21:30–21:40 (marginal, 0.17 h) | 42.9° 18:05 | 7.88 | 61% | 42.4° |
| 2036-04-05 Sat | 2 | — | unknown | — | 42.9° 18:00 | 7.83 | 72% | 54.3° |
| 2036-04-06 Sun | 2 | — | unknown | — | 42.9° 17:55 | 7.77 | 81% | 66.9° |
| 2036-04-07 Mon | 1 | — | unknown | — | 42.9° 17:50 | 7.72 | 89% | 79.9° |
| 2036-04-08 Tue | 1 | — | unknown | — | 42.9° 17:50 | 7.66 | 95% | 92.8° |
| 2036-04-09 Wed | 1 | — | unknown | — | 42.9° 17:45 | 7.6 | 99% | 105.6° |
| 2036-04-10 Thu | 1 | — | unknown | — | 42.9° 17:40 | 7.55 | 100% | 118.0° |
| 2036-04-11 Fri | 1 | — | unknown | — | 42.9° 17:35 | 7.49 | 98% | 129.8° |
| 2036-04-12 Sat | 1 | — | unknown | — | 42.9° 17:35 | 7.43 | 95% | 140.5° |
| 2036-04-13 Sun | 1 | — | unknown | — | 42.9° 17:30 | 7.38 | 89% | 149.4° |
| 2036-04-14 Mon | 0 | — | unknown | — | 42.9° 17:25 | 7.32 | 82% | 154.9° |
| 2036-04-15 Tue | 0 | — | unknown | — | 42.9° 17:20 | 7.26 | 74% | 155.2° |
| 2036-04-16 Wed | 0 | — | unknown | — | 42.9° 17:15 | 7.2 | 66% | 150.4° |
| 2036-04-17 Thu | 0 | — | unknown | — | 42.9° 17:15 | 7.14 | 56% | 142.6° |
| 2036-04-18 Fri | 0 | — | unknown | — | 42.9° 17:10 | 7.09 | 47% | 133.2° |
| 2036-04-19 Sat | 0 | — | unknown | — | 42.9° 17:05 | 7.03 | 37% | 123.1° |
| 2036-04-20 Sun | 0 | — | unknown | — | 42.9° 17:00 | 6.97 | 28% | 112.5° |
| 2036-04-21 Mon | 0 | — | unknown | — | 42.9° 16:55 | 6.91 | 20% | 101.6° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2036-03-23&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.