import { Observable } from 'rxjs';
export declare class ItDateUtils {
    /**
     * Add seconds to date
     * @param date the date
     * @param seconds seconds to add
     */
    static addSeconds(date: Date, seconds: number): Date;
    /**
     * Add minutes to date
     * @param date the date
     * @param minutes minutes to add
     */
    static addMinutes(date: Date, minutes: number): Date;
    /**
     * Add hours to date
     * @param date the date
     * @param hours hours to add
     */
    static addHours(date: Date, hours: number): Date;
    /**
     * Add days to date
     * @param date the date
     * @param days days to add
     */
    static addDays(date: Date, days: number): Date;
    /**
     * Add years to date
     * @param date the date
     * @param months months to add
     */
    static addMonths(date: Date, months: number): Date;
    /**
     * Add years to date
     * @param date the date
     * @param years years to add
     */
    static addYears(date: Date, years: number): Date;
    /**
     * Calculate number of days between two date
     * @param startDate
     * @param endDate
     * @param absolute return unsigned result
     */
    static countDays(startDate: Date, endDate: Date, absolute?: boolean): number;
    /**
     * Check if string is a date with iso format
     * @param value the string
     */
    static isIsoString(value: string | null): boolean;
    /**
     * Convert iso string to Date
     * @param isoString the iso string
     */
    static isoStringToDate(isoString: string | null): Date | null;
    /**
     * Remove time from an iso date string
     * @param isoString the iso string
     */
    static isoStringRemoveTime(isoString: string): string;
    /**
     * Set iso string hours to 0 and format correctly the date (consider timezone offset)
     * @example '2024-03-04T23:00:00.000Z' -> '2024-03-05T00:00:00.000Z'
     * @param isoString the iso string
     */
    static isoStringSetZeroTime(isoString: string): string;
    /**
     * Calculate the date time left and return the string format [d h m s]
     * @param endDate
     */
    static timeLeftString(endDate: Date): Observable<string>;
    /**
     * Calculate the next day of week
     * @param dayOfWeek Day of week 0=Sunday, 1=Monday...4=Thursday...
     * @param hour the specif hour
     * @param minute the specific minute
     */
    static nextWeekDayAndTime(dayOfWeek: number, hour?: number, minute?: number): Date;
}