dayOfWeek

dayOfWeek(date) → number · Date & Time

Return the day of the week as a number (1=Monday, 7=Sunday).

• date (required): a date or datetime value

let d = parseDate("2026-05-01", "yyyy-MM-dd")
{
  weekday: dayOfWeek(d)          // 5 (Thursday — 1=Monday, 7=Sunday)
}