← 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. |
|---|---|---|---|---|---|---|---|---|
| 2037-03-26 Thu | 0 | — | unknown | — | 79.2° 13:40 | 8.39 | 73% | 91.1° |
| 2037-03-27 Fri | 0 | — | unknown | — | 79.2° 13:35 | 8.34 | 83% | 104.3° |
| 2037-03-28 Sat | 0 | — | unknown | — | 79.1° 13:30 | 8.28 | 91% | 117.6° |
| 2037-03-29 Sun | 0 | — | unknown | — | 79.2° 14:30 | 8.23 | 97% | 130.6° |
| 2037-03-30 Mon | 0 | — | unknown | — | 79.2° 14:25 | 8.17 | 100% | 142.6° |
| 2037-03-31 Tue | 0 | — | unknown | — | 79.2° 14:20 | 8.12 | 99% | 152.0° |
| 2037-04-01 Wed | 0 | — | unknown | — | 79.2° 14:15 | 8.06 | 96% | 155.6° |
| 2037-04-02 Thu | 0 | — | unknown | — | 79.1° 14:10 | 8.01 | 91% | 151.6° |
| 2037-04-03 Fri | 0 | — | unknown | — | 79.2° 14:10 | 7.95 | 84% | 142.9° |
| 2037-04-04 Sat | 0 | — | unknown | — | 79.2° 14:05 | 7.9 | 75% | 132.3° |
| 2037-04-05 Sun | 0 | — | unknown | — | 79.2° 14:00 | 7.84 | 65% | 121.1° |
| 2037-04-06 Mon | 0 | — | unknown | — | 79.2° 13:55 | 7.79 | 55% | 109.9° |
| 2037-04-07 Tue | 0 | — | unknown | — | 79.1° 13:55 | 7.73 | 46% | 98.8° |
| 2037-04-08 Wed | 0 | — | unknown | — | 79.2° 13:50 | 7.67 | 36% | 87.8° |
| 2037-04-09 Thu | 0 | — | unknown | — | 79.2° 13:45 | 7.62 | 27% | 77.0° |
| 2037-04-10 Fri | 0 | — | unknown | — | 79.2° 13:40 | 7.56 | 19% | 66.4° |
| 2037-04-11 Sat | 0 | — | unknown | — | 79.1° 13:35 | 7.5 | 12% | 55.9° |
| 2037-04-12 Sun | 0 | — | unknown | — | 79.2° 13:35 | 7.45 | 7% | 45.9° |
| 2037-04-13 Mon | 0 | — | unknown | — | 79.2° 13:30 | 7.39 | 3% | 36.7° |
| 2037-04-14 Tue | 0 | — | unknown | — | 79.2° 13:25 | 7.33 | 1% | 29.0° |
| 2037-04-15 Wed | 0 | — | unknown | — | 79.2° 13:20 | 7.27 | 0% | 24.7° |
| 2037-04-16 Thu | 0 | — | unknown | — | 79.1° 13:15 | 7.22 | 2% | 25.7° |
| 2037-04-17 Fri | 0 | — | unknown | — | 79.2° 13:15 | 7.16 | 5% | 31.8° |
| 2037-04-18 Sat | 0 | — | unknown | — | 79.2° 13:10 | 7.1 | 11% | 40.8° |
| 2037-04-19 Sun | 0 | — | unknown | — | 79.2° 13:05 | 7.04 | 18% | 51.4° |
| 2037-04-20 Mon | 0 | — | unknown | — | 79.2° 13:00 | 6.98 | 27% | 63.0° |
| 2037-04-21 Tue | 0 | — | unknown | — | 79.1° 13:00 | 6.93 | 37% | 75.0° |
| 2037-04-22 Wed | 0 | — | unknown | — | 79.2° 12:55 | 6.87 | 48% | 87.5° |
| 2037-04-23 Thu | 0 | — | unknown | — | 79.2° 12:50 | 6.81 | 59% | 100.2° |
| 2037-04-24 Fri | 0 | — | unknown | — | 79.2° 12:45 | 6.75 | 70% | 113.1° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2037-03-26&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.