Variable DATE_PART_INTERVALConst

DATE_PART_INTERVAL: readonly [
    readonly ["year", 0, 9999],
    readonly ["month", 1, 12],
    readonly ["day", 1, 31],
    readonly ["hour", 0, 23],
    readonly ["minute", 0, 59],
    readonly ["second", 0, 59],
    readonly ["millisecond", 0, 999],
] = ...