daysInYear

daysInYear(date) → number · Date & Time

Get the number of days in the year of the given date (365 or 366 for leap years).

• date (required): a date or datetime value

{
  y2026: daysInYear(parseDate("2026-01-01", "yyyy-MM-dd")),    // 365
  y2024: daysInYear(parseDate("2024-01-01", "yyyy-MM-dd"))     // 366 (leap year)
}