export declare class DateUtils {
    static getStartOfDay(date: Date): Date;
    static getEndOfDay(date: Date): Date;
    static toISOString(date: Date): string;
    static getDateOnly(date?: Date, separator?: string): string;
    static toDateWithOutTimeZone(time: string): string;
    static hHMMSSToDate(time: (string | undefined)): Date;
    static dateToHHMMSS(date: string): string;
    static timeToDate(time?: string): (Date | null);
}