export declare const WEEK_STARTS_ON: 0 | 1 | 6;
export declare const FIRST_DAY_OF_YEAR: {
    0: number;
    1: number;
    6: number;
};
export declare const MILLISECONDS_IN_WEEK = 604800000;
export declare const STARTS_OF_WEEK: Record<string, 0 | 1 | 6>;
export declare const DAYS_PER_MONTH: number[];