Function buildDateStamp

ng-dev/release/notes/context.ts:254–260

(date = new Date())

 * Uses the current date, or a provided date in the format of YYYY-MM-DD, i.e. 1970-11-05.
 */
export function buildDateStamp(date = new Date()) {
  const year = `${date.getFullYear()}`;
  const month = `${date.getMonth() + 1}`.padStart(2, '0');
  const day = `${date.getDate()}`.padStart(2, '0');

  return [year, month, day].join('-');
}