declare class DateUtil {
    private static readonly instance;
    private static readonly monthAbrs;
    private static readonly mFullNames;
    private static readonly dayAbrs;
    private static readonly dFullNames;
    private constructor();
    /**
     * Returns a new Date object with the current date and time.
     * @returns {Date} A new Date object with the current date and time.
     */
    getCurrentDate(): Date;
    /**
     * Returns a new Date object with the time set to midnight.
     * @returns {Date} A Date object with the current date and time.
     */
    today(): Date;
    /**
     * Returns a new Date object that is set to tomorrow's date.
     * @returns {Date} A date object that is the current date plus one day.
     */
    tomorrow(): Date;
    /**
     * Returns a new Date object that is set to yesterday's date.
     * @returns {Date} A date object that is yesterday's date.
     */
    yesterday(): Date;
    /**
     * Compares two dates and returns the difference between them in milliseconds.
     * @param {T | number | Date} dt1 - The first date.
     * @param {T | number | Date} dt2 - The second date.
     * @returns {number} The difference between the two dates in milliseconds.
     */
    compareDates<T extends Date>(dt1: T | number | Date, dt2: T | number | Date): number;
    /**
     * Checks if two dates are equal.
     * @param {T | number | Date} dt1 - The first date.
     * @param {T | number | Date} dt2 - The second date.
     * @returns {boolean} True if the two dates are equal, false otherwise.
     */
    equals<T extends Date>(dt1: T | number | Date, dt2: T | number | Date): boolean;
    /**
     * Returns the month abbreviation for the given month number (1-12).
     * @param {number} number - The month number (1-12).
     * @returns {string} The month abbreviation.
     */
    getMonthAbbr(number: number): string;
    /**
     * Returns the full name of the month for the given month number (1-12).
     * @param {number} number - The month number (1-12).
     * @returns {string} The full name of the month.
     */
    getMonthFullName(number: number): string;
    /**
     * Returns the day abbreviation for the given day number (0-6, where 0 is Sunday).
     * @param {number} number - The day number (0-6).
     * @returns {string} The day abbreviation.
     */
    getDayAbbr(number: number): string;
    /**
     * Returns the full name of the day for the given day number (0-6, where 0 is Sunday).
     * @param {number} number - The day number (0-6).
     * @returns {string} The full name of the day.
     */
    getDayFullName(number: number): string;
    /**
     * Checks if a given year is a leap year.
     * @param {number} year - The year.
     * @returns {boolean} True if the year is a leap year, false otherwise.
     */
    isLeapYear(year: number): boolean;
    /**
     * It returns the first day of the week (Monday) based on the current date.
     * @returns The first day of the week.
     */
    weekFirstDay(): Date;
    /**
     * It returns the last day of the week.
     * @returns The last day of the week.
     */
    weekLastDay(): Date;
    /**
     * Returns an array of leap years between a start and end year (inclusive).
     * @param {number} startYear - The start year.
     * @param {number} endYear - The end year.
     * @returns {number[]} An array of leap years.
     */
    leapYearsInRange(startYear: number, endYear: number): number[];
    /**
     * Returns the first day of the current month.
     * @returns {Date} A Date object representing the first day of the current month.
     */
    getMonthFirstDay(): Date;
    /**
     * Returns the last day of the current month.
     * @returns {Date} A Date object representing the last day of the current month.
     */
    getMonthLastDay(): Date;
    /**
     * Converts the input to a Date object.
     * @param {T | number | Date} input - The input value.
     * @returns {Date} A Date object.
     */
    toDate<T extends Date>(input: T | number): Date;
    /**
     * If date1 is before date2, return true, else return false.
     * @param {T | number | Date} date1 - T | number | Date
     * @param {T | number | Date} date2 - T | number | Date
     * @returns A boolean value.
     */
    isAfter<T extends Date>(date1: T | number | Date, date2: T | number | Date): boolean;
    /**
     * If date1 is before date2, return true, else return false.
     * @param {number | Date} date1 - T | number | Date
     * @param {number | Date} date2 - T | number | Date
     * @returns A boolean value.
     */
    isBefore<T extends Date>(date1: T | number | Date, date2: T | number | Date): boolean;
    /**
     * This function takes a number of years and returns the number of months in that number of years.
     * @param {number} years - number
     * @returns The number of months in the given number of years.
     */
    yearsToMonths(years: number): number;
    /**
     * Checks if a given date falls on a weekend (Saturday or Sunday).
     * @param {T | number | Date} dt - The date to check.
     * @returns {boolean} True if the date falls on a weekend, false otherwise.
     */
    isWeekend<T extends Date>(dt: T | number | Date): boolean;
    /**
     * Calculates the difference in days between two dates.
     * @param {T | number | Date} dt1 - The first date.
     * @param {T | number | Date} dt2 - The second date.
     * @returns {number} The difference in days between the two dates.
     */
    getDaysDiff<T extends Date>(dt1: T | number | Date, dt2: T | number | Date): number;
    /**
     * Adds the specified number of days to a given date.
     * @param {T | number | Date} dt - The date to add days to.
     * @param {number} days - The number of days to add.
     * @returns {Date} The resulting date after adding the specified number of days.
     */
    addDays<T extends Date>(dt: T | number | Date, days: number): Date;
    /**
     * Formats a given date object into a string representation using the specified format.
     * @param {number | Date} dt - The date object to format.
     * @param {string} format - The format string. (e.g., 'YYYY-MM-DD')
     * @returns {string} The formatted date string.
     */
    formatDate<T extends Date>(dt: T | number | Date, format: string): string;
    /**
     * Returns the current timestamp in milliseconds.
     * @returns {number} The current timestamp in milliseconds.
     */
    getCurrentTimestamp(): number;
    static getInstance(): DateUtil;
}
declare const _default: DateUtil;
export default _default;