Sunrise, sunset, solar noon, three twilights, golden and blue hour for a lat/lon...

{ "method": "GET", "queryParams": { "date": "2026-06-21", "lat": 40.7128, "lon": -74.006, "utc_offset_hours": -4 }, "type": "http" }

{ "example": { "accuracy": "about 1 minute at mid latitudes", "asOf": "2026-10-21T01:01:42.756Z", "astronomicalDawn": { "local": "03:19", "utc": "2026-06-21T07:18:31Z" }, "astronomicalDusk": { "local": "22:37", "utc": "2026-06-22T02:37:17Z" }, "blueHourEvening": { "end": { "local": "21:18", "utc": "2026-06-22T01:17:51Z" }, "start": { "local": "20:51", "utc": "2026-06-22T00:50:59Z" } }, "blueHourMorning": { "end": { "local": "05:05", "utc": "2026-06-21T09:04:49Z" }, "start": { "local": "04:38", "utc": "2026-06-21T08:37:56Z" } }, "civilDawn": { "local": "04:52", "utc": "2026-06-21T08:51:36Z" }, "civilDusk": { "local": "21:04", "utc": "2026-06-22T01:04:12Z" }, "date": "2026-06-21", "dayLengthMinutes": 905.7, "degraded": false, "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.", "goldenHourEvening": { "end": { "local": "20:51", "utc": "2026-06-22T00:50:59Z" }, "start": { "local": "19:49", "utc": "2026-06-21T23:49:27Z" } }, "goldenHourMorning": { "end": { "local": "06:06", "utc": "2026-06-21T10:06:21Z" }, "start": { "local": "05:05", "utc": "2026-06-21T09:04:49Z" } }, "lat": 40.7128, "localDayStartUtc": "2026-06-21T04:00:00Z", "lon": -74.006, "maxAltitudeDeg": 72.72, "nauticalDawn": { "local": "04:09", "utc": "2026-06-21T08:08:56Z" }, "nauticalDusk": { "local": "21:47", "utc": "2026-06-22T01:46:52Z" }, "notChecked": [ "terrain and building horizons (hills and buildings shorten the usable day)", "weather and unusual refraction (standard -0.833 degree rise/set altitude is used: 34 arcminutes refraction plus the Sun's 16 arcminute radius)", "…3 more" ], "reasons": [ "Sunrise and sunset use the Sun's centre at -0.833 degrees (refraction plus the Sun's radius). Civil, nautical and astronomical twilight begin or end when the centre is 6, 12 and 18 degrees below the h…", "Golden hour here means the Sun between -4 and +6 degrees altitude; blue hour between -8 and -4 degrees. These are photographers' conventions, not official definitions." ], "solarNoon": { "local": "12:58", "utc": "2026-06-21T16:57:54Z" }, "source": "Meeus, Astronomical Algorithms ch. 25, 12, 13, 15; computed locally by scanning the Sun's altitude curve", "summary": "2026-06-21: sunrise 05:25, sunset 20:31 (UTC-4), day length 15 h 6 min.", "sunAltitudeAtLocalMidnightDeg": -24.46, "sunrise": { "local": "05:25", "utc": "2026-06-21T09:25:01Z" }, "sunset": { "local": "20:31", "utc": "2026-06-22T00:30:46Z" }, "utcOffsetHours": -4, "verdict": "NORMAL_DAY" }, "type": "json" }