Function DayFromYear

packages/ecma262-abstract/DateOperations.ts:15–23

(y: number)

}

export function DayFromYear(y: number): number {
  if (y < 100) {
    const date = new Date(0)
    date.setUTCFullYear(y, 0, 1)
    date.setUTCHours(0, 0, 0, 0)
    return date.getTime() / MS_PER_DAY
  }
  return Date.UTC(y, 0) / MS_PER_DAY
}

export function YearFromTime(t: number): number {
  return new Date(t).getUTCFullYear()