export declare class DatetimeHelper {
    private static isDate;
    private static isString;
    private static parseDate;
    static parseDates(dates: Date[] | string[] | Date | string): Date[];
    static setToMidnight(date: Date, localTime?: boolean): Date;
    static getDateString(date: Date, localTime?: boolean, omitLeadingZeroes?: boolean, separator?: string): string;
    static getISOStringUTCFromDKTime(date: Date | string): string;
    static getISOStringForDKTime(date: Date): string;
}