← 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. |
|---|---|---|---|---|---|---|---|---|
| 2038-05-20 Thu | 6 | — | unknown | 03:35–04:00 (marginal, 0.42 h) | 89.8° 10:10 | 5.32 | 94% | 112.7° |
| 2038-05-21 Fri | 6 | — | unknown | 03:30–04:00 (marginal, 0.5 h) | 89.7° 10:05 | 5.27 | 87% | 102.0° |
| 2038-05-22 Sat | 6 | — | unknown | 03:25–03:55 (marginal, 0.5 h) | 89.6° 10:00 | 5.22 | 78% | 91.3° |
| 2038-05-23 Sun | 6 | — | unknown | 03:20–03:55 (marginal, 0.58 h) | 89.6° 10:00 | 5.17 | 69% | 81.0° |
| 2038-05-24 Mon | 7 | — | unknown | 03:15–03:55 (marginal, 0.67 h) | 89.7° 09:55 | 5.12 | 59% | 71.2° |
| 2038-05-25 Tue | 8 | — | unknown | 03:15–03:55 (marginal, 0.67 h) | 89.8° 09:50 | 5.08 | 49% | 62.1° |
| 2038-05-26 Wed | 9 | — | unknown | 03:10–03:50 (marginal, 0.67 h) | 89.7° 09:45 | 5.03 | 40% | 53.8° |
| 2038-05-27 Thu | 11 | — | unknown | 03:05–04:40 (marginal, 1.58 h) | 89.5° 09:40 | 4.99 | 31% | 46.8° |
| 2038-05-28 Fri | 14 | — | unknown | 03:35–03:50 (good, 0.25 h) | 89.6° 09:40 | 4.95 | 22% | 41.5° |
| 2038-05-29 Sat | 16 | — | unknown | 03:30–03:50 (good, 0.33 h) | 89.8° 09:35 | 4.91 | 15% | 38.6° |
| 2038-05-30 Sun | 16 | — | unknown | 03:25–03:45 (good, 0.33 h) | 89.8° 09:30 | 4.87 | 9% | 38.7° |
| 2038-05-31 Mon | 17 | — | unknown | 03:25–03:45 (good, 0.33 h) | 89.6° 09:25 | 4.83 | 4% | 41.8° |
| 2038-06-01 Tue | 19 | — | unknown | 03:20–03:45 (good, 0.42 h) | 89.5° 09:25 | 4.79 | 1% | 47.3° |
| 2038-06-02 Wed | 21 | — | unknown | 03:15–03:45 (good, 0.5 h) | 89.7° 09:20 | 4.76 | 0% | 54.6° |
| 2038-06-03 Thu | 22 | — | unknown | 03:10–03:45 (good, 0.58 h) | 89.8° 09:15 | 4.72 | 1% | 63.0° |
| 2038-06-04 Fri | 23 | — | unknown | 03:05–03:45 (good, 0.67 h) | 89.7° 09:10 | 4.69 | 4% | 72.4° |
| 2038-06-05 Sat | 24 | — | unknown | 03:05–03:40 (good, 0.58 h) | 89.6° 09:05 | 4.66 | 8% | 82.2° |
| 2038-06-06 Sun | 25 | — | unknown | 03:00–03:40 (good, 0.67 h) | 89.6° 09:05 | 4.63 | 15% | 92.4° |
| 2038-06-07 Mon | 26 | — | unknown | 02:55–03:40 (good, 0.75 h) | 89.7° 09:00 | 4.6 | 23% | 102.6° |
| 2038-06-08 Tue | 27 | — | unknown | 02:50–03:40 (good, 0.83 h) | 89.8° 08:55 | 4.58 | 33% | 112.8° |
| 2038-06-09 Wed | 28 | — | unknown | 02:45–03:40 (good, 0.92 h) | 89.7° 08:50 | 4.55 | 44% | 122.6° |
| 2038-06-10 Thu | 30 | — | unknown | 02:45–03:40 (good, 0.92 h) | 89.5° 08:45 | 4.53 | 55% | 131.3° |
| 2038-06-11 Fri | 31 | — | unknown | 02:45–03:40 (good, 0.92 h) | 89.6° 08:45 | 4.51 | 66% | 138.0° |
| 2038-06-12 Sat | 32 | — | unknown | 02:45–03:40 (good, 0.92 h) | 89.8° 08:40 | 4.49 | 77% | 141.5° |
| 2038-06-13 Sun | 29 | — | unknown | 02:40–03:40 (good, 1.0 h) | 89.8° 08:35 | 4.48 | 86% | 140.5° |
| 2038-06-14 Mon | 29 | — | unknown | 02:40–03:40 (good, 1.0 h) | 89.7° 08:30 | 4.46 | 93% | 135.2° |
| 2038-06-15 Tue | 30 | — | unknown | 02:35–03:40 (good, 1.08 h) | 89.5° 08:30 | 4.45 | 98% | 127.0° |
| 2038-06-16 Wed | 30 | — | unknown | 02:35–03:40 (good, 1.08 h) | 89.7° 08:25 | 4.44 | 100% | 117.1° |
| 2038-06-17 Thu | 27 | — | unknown | 02:35–03:40 (good, 1.08 h) | 89.8° 08:20 | 4.43 | 99% | 106.5° |
| 2038-06-18 Fri | 24 | — | unknown | 02:40–03:40 (good, 1.0 h) | 89.7° 08:15 | 4.43 | 96% | 95.7° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2038-05-20&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.