export declare function validateTimezone(timezone: string): Promise<unknown>;
export declare function getBeginningOfMonth(date: Date, amount: number): Date;
export declare function getBeginningOfDay(date: Date, amount: number): Date;
export declare function daysInMonth(theDate: Date): number;
export declare function getStartEndDateForInterval(startDate: string, endDate: string, interval: string): {
  timelineStart: Date;
  timelineEnd: Date;
};
/**
 * Returns a new array with the time values for each tick
 *
 * @param start
 * @param end
 * @param interval
 * @param intervalValue
 * @param timezone
 * @returns
 */
export declare function dateRange(start: any, end: any, interval: any, intervalValue?: any, timezone?: any): (string | Date)[][];