← 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. |
|---|---|---|---|---|---|---|---|---|
| 2026-03-27 Fri | 42 | 7 | 3 | 02:55–03:00 (marginal, 0.08 h) | 71.1° 08:00 | 8.35 | 73% | 134.7° |
| 2026-03-28 Sat | 40 | 0 | 0 | — | 71.1° 08:55 | 8.3 | 82% | 135.2° |
| 2026-03-29 Sun | 37 | 0 | 0 | — | 71.1° 08:50 | 8.25 | 90% | 132.5° |
| 2026-03-30 Mon | 37 | 0 | 0 | — | 71.1° 08:50 | 8.19 | 95% | 127.3° |
| 2026-03-31 Tue | 37 | 0 | 0 | — | 71.1° 08:45 | 8.14 | 99% | 120.5° |
| 2026-04-01 Wed | 35 | 0 | 0 | — | 71.1° 08:40 | 8.08 | 100% | 112.6° |
| 2026-04-02 Thu | 32 | 0 | 0 | — | 71.1° 08:35 | 8.03 | 99% | 104.2° |
| 2026-04-03 Fri | 29 | 0 | 0 | — | 71.1° 08:35 | 7.97 | 96% | 95.5° |
| 2026-04-04 Sat | 28 | 11 | 3 | — | 71.1° 08:30 | 7.92 | 92% | 86.9° |
| 2026-04-05 Sun | 27 | 91 | 25 | 04:45–05:20 (good, 0.58 h) | 71.1° 08:25 | 7.86 | 86% | 78.4° |
| 2026-04-06 Mon | 27 | 88 | 24 | 04:00–05:00 (good, 1.0 h) | 71.1° 08:20 | 7.8 | 79% | 70.3° |
| 2026-04-07 Tue | 29 | 73 | 21 | 05:00–05:20 (good, 0.33 h) | 71.1° 08:15 | 7.75 | 71% | 62.7° |
| 2026-04-08 Wed | 30 | 1 | 0 | — | 71.1° 08:15 | 7.69 | 62% | 55.9° |
| 2026-04-09 Thu | 35 | 5 | 2 | 02:50–03:00 (marginal, 0.17 h) | 71.1° 08:10 | 7.64 | 53% | 50.2° |
| 2026-04-10 Fri | 44 | 0 | 0 | — | 71.1° 08:05 | 7.58 | 43% | 46.3° |
| 2026-04-11 Sat | 49 | 2 | 1 | — | 71.1° 08:00 | 7.52 | 33% | 44.6° |
| 2026-04-12 Sun | 54 | 0 | 0 | — | 71.1° 07:55 | 7.47 | 24% | 45.6° |
| 2026-04-13 Mon | 56 | 0 | 0 | — | 71.1° 07:55 | 7.41 | 16% | 49.5° |
| 2026-04-14 Tue | 58 | 14 | 8 | 02:50–03:00 (good, 0.17 h) | 71.1° 07:50 | 7.35 | 9% | 55.7° |
| 2026-04-15 Wed | 59 | 0 | 0 | — | 71.1° 07:45 | 7.29 | 3% | 63.9° |
| 2026-04-16 Thu | 59 | 34 | 20 | 04:00–05:35 (marginal, 1.58 h) | 71.1° 07:40 | 7.24 | 0% | 73.3° |
| 2026-04-17 Fri | 61 | 96 | 58 | 02:40–05:00 (good, 2.33 h) | 71.1° 07:40 | 7.18 | 0% | 83.6° |
| 2026-04-18 Sat | 62 | 96 | 60 | 02:40–04:55 (good, 2.25 h) | 71.1° 07:35 | 7.12 | 3% | 94.2° |
| 2026-04-19 Sun | 63 | 89 | 56 | 02:30–04:55 (good, 2.42 h) | 71.1° 07:30 | 7.06 | 9% | 104.6° |
| 2026-04-20 Mon | 63 | 92 | 58 | 02:25–04:50 (good, 2.42 h) | 71.1° 07:25 | 7.0 | 16% | 114.5° |
| 2026-04-21 Tue | 65 | 0 | 0 | — | 71.1° 07:20 | 6.95 | 26% | 123.2° |
| 2026-04-22 Wed | 66 | 0 | 0 | — | 71.1° 07:20 | 6.89 | 37% | 130.0° |
| 2026-04-23 Thu | 66 | 57 | 38 | 02:20–04:00 (good, 1.67 h) | 71.1° 07:15 | 6.83 | 48% | 134.3° |
| 2026-04-24 Fri | 67 | 90 | 60 | 03:25–04:45 (good, 1.33 h) | 71.1° 07:10 | 6.77 | 59% | 135.5° |
| 2026-04-25 Sat | 66 | 98 | 64 | 02:20–04:45 (good, 2.42 h) | 71.1° 07:05 | 6.71 | 69% | 133.5° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2026-03-27&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.