export declare const getWeekNumber: (date: Date) => number;
export declare const getWeekOfYear: () => number;
export declare const getWeekIsoNumber: (date: Date) => number;
export declare const getWeekIsoOfYear: () => number;
export declare const getIsoYearByDate: (date: Date) => number;
export declare const getIsoYear: () => number;
export declare const getDateOfISOWeek: (week: number, year: number) => Date;