Function mod

packages/ecma262-abstract/DateOperations.ts:3–5

(x: number, y: number)

const MS_PER_DAY = 86400000

function mod(x: number, y: number): number {
  return x - Math.floor(x / y) * y
}

export function Day(t: number): number {
  return Math.floor(t / MS_PER_DAY)