export {};
declare global {
    interface Date {
        /**
         * @returns date in fifa format
         */
        toFifaDate(): number;
        /**
         * @returns incremented date
         */
        addYear(years: number): Date;
        /**
         * @returns date without time and zone
         */
        normalize(): Date;
        /**
         * @returns age
         */
        age(refDate?: Date): number;
    }
    interface DateConstructor {
        /**
         * @returns date from fifa format
         */
        fromFifaDate(value: number): Date;
    }
}