Function sunset

sunset(latitude: number, longitude: number, date: Date | null): Date | null
Returns the time of sunset for the given coordinates and date, or null if the sun does not set on that date (midnight sun).
Parameters
- latitude: number
  degrees north (positive) or south (negative)
- longitude: number
  degrees east (positive) or west (negative)
- date: Date | null
  the date to calculate for; pass null or omit to use today
Returns Date | null
A Date object representing the time of sunset, or null