Twilight 2024 Calendar Calculator

Twilight 2024 Calendar Calculator. Start every quarter on the same weekday (every month for symmetry454) symmetrically distribute leap years at intervals that are as smoothly spread as possible. Click settings to define holidays.

For users with other devices, we have a mobile page that can retrieve your current position if your device has gps, and displays two days of sunrise, sunset and twilight times for that location. Astronomical twilight occurs when the sun’s center is between 12 and 18 degrees below the horizon.