/**
 * A data structure that represents a day (year, month, and day)
 * without consideration for time or timezone.
 *
 * @public
 */
export default class Day {
    /**
     * Clones a {@link Day} instance.
     *
     * @public
     * @static
     * @param {Day} value
     * @returns {Day}
     */
    public static clone(value: Day): Day;
    /**
     * Converts a string (which matches the output of {@link Day#format}) into
     * a {@link Day} instance.
     *
     * @public
     * @static
     * @param {string} value
     * @param {DayFormatType=} type
     * @returns {Day}
     */
    public static parse(value: string, type?: DayFormatType | undefined): Day;
    /**
     * Creates a {@link Day} from the year, month, and day properties (in local time)
     * of the {@link Date} argument.
     *
     * @public
     * @static
     * @param {Date} date
     * @returns {Day}
     */
    public static fromDate(date: Date): Day;
    /**
     * Creates a {@link Day} from the year, month, and day properties (in UTC)
     * of the {@link Date} argument.
     *
     * @public
     * @static
     * @param {Date} date
     * @returns {Day}
     */
    public static fromDateUtc(date: Date): Day;
    /**
     * Returns a {@link Day} instance using today's local date.
     *
     * @public
     * @static
     * @returns {Day}
     */
    public static getToday(): Day;
    /**
     * Returns true if the year, month, and day combination is valid; otherwise false.
     *
     * @public
     * @static
     * @param {number} year
     * @param {number} month
     * @param {number} day
     * @returns {boolean}
     */
    public static validate(year: number, month: number, day: number): boolean;
    /**
     * Returns the number of days in a given month.
     *
     * @public
     * @static
     * @param {number} year - The year number (e.g. 2017)
     * @param {number} month - The month number (e.g. 2 is February)
     * @returns {number}
     */
    public static getDaysInMonth(year: number, month: number): number;
    /**
     * A comparator function for {@link Day} instances.
     *
     * @public
     * @static
     * @param {Day} a
     * @param {Day} b
     * @returns {number}
     */
    public static compareDays(a: Day, b: Day): number;
    /**
     * Calculates the number of days between two {@link Day} instances (may return
     * a negative value).
     *
     * @public
     * @static
     * @param {Day} a
     * @param {Day} b
     * @returns {number}
     */
    public static countDaysBetween(a: Day, b: Day): number;
    /**
     * @param {number} year
     * @param {number} month
     * @param {number} day
     */
    constructor(year: number, month: number, day: number);
    /**
     * Calculates a new {@link Day} in the future (or past).
     *
     * @public
     * @param {number} days - The number of days to add (negative numbers can be used for subtraction).
     * @param {boolean=} inverse - If true, the sign of the "days" value will be flipped.
     * @returns {Day}
     */
    public addDays(days: number, inverse?: boolean | undefined): Day;
    /**
     * Calculates a new {@link Day} in the past (or future).
     *
     * @public
     * @param {number} days - The number of days to subtract (negative numbers can be used for addition).
     * @returns {Day}
     */
    public subtractDays(days: number): Day;
    /**
     * Calculates a new {@link Day} in the future (or past). If the new date is at the end of
     * the month and the new month has fewer days than the current month, days will be subtracted
     * as necessary (e.g. adding one month to March 31 will return April 30).
     *
     * @public
     * @param {number} months - The number of months to add (negative numbers can be used for subtraction).
     * @param {boolean=} inverse - If true, the sign of the "days" value will be flipped.
     * @returns {Day}
     */
    public addMonths(months: number, inverse?: boolean | undefined): Day;
    /**
     * Calculates a new {@link Day} in the past (or future).
     *
     * @public
     * @param {number} months - The number of months to subtract (negative numbers can be used for addition).
     * @returns {Day}
     */
    public subtractMonths(months: number): Day;
    /**
     * Calculates a new {@link Day} in the future (or past). If the new date is at the end of
     * the month and the new month has fewer days than the current month, days will be subtracted
     * as necessary (e.g. adding one year to February 29 will return February 28).
     *
     * @public
     * @param {number} years - The number of years to add (negative numbers can be used for subtraction).
     * @param {boolean=} inverse - If true, the sign of the "days" value will be flipped.
     * @returns {Day}
     */
    public addYears(years: number, inverse?: boolean | undefined): Day;
    /**
     * Calculates a new {@link Day} in the past (or future).
     *
     * @public
     * @param {number} years - The number of years to subtract (negative numbers can be used for addition).
     * @returns {Day}
     */
    public subtractYears(years: number): Day;
    /**
     * Returns a new {@link Day} instance for the start of the month referenced by the current instance.
     *
     * @public
     * @returns {Day}
     */
    public getStartOfMonth(): Day;
    /**
     * Returns a new instance for the {@link Day} end of the month referenced by the current instance.
     *
     * @public
     * @returns {Day}
     */
    public getEndOfMonth(): Day;
    /**
     * Indicates if the current {@link Day} instance occurs before another day.
     *
     * @public
     * @param {Day} other
     * @returns {boolean}
     */
    public getIsBefore(other: Day): boolean;
    /**
     * Indicates if the current {@link Day} instance occurs after another day.
     *
     * @public
     * @param {Day} other
     * @returns {boolean}
     */
    public getIsAfter(other: Day): boolean;
    /**
     * Indicates the current day falls between two other days, inclusive
     * of the range boundaries.
     *
     * @public
     * @param {Day=} first
     * @param {Day=} last
     * @returns {boolean}
     */
    public getIsContained(first?: Day | undefined, last?: Day | undefined): boolean;
    /**
     * Indicates if another {@link Day} refers to the same moment.
     *
     * @public
     * @param {Day} other
     * @returns {boolean}
     */
    public getIsEqual(other: Day): boolean;
    /**
     * Calculates and returns name of the day of the week (e.g. Monday, Tuesday, Wednesday, etc.).
     *
     * @public
     * @returns {string}
     */
    public getName(): string;
    /**
     * The year.
     *
     * @public
     * @returns {number}
     */
    public get year(): number;
    /**
     * The month of the year (January is one, December is twelve).
     *
     * @public
     * @returns {number}
     */
    public get month(): number;
    /**
     * The day of the month.
     *
     * @public
     * @returns {number}
     */
    public get day(): number;
    /**
     * Outputs the date as the formatted string: {year}-{month}-{day}.
     *
     * @public
     * @returns {string}
     */
    public format(): string;
    /**
     * Returns the JSON representation.
     *
     * @public
     * @returns {string}
     */
    public toJSON(): string;
    /**
     * Returns a string representation.
     *
     * @public
     * @returns {string}
     */
    public toString(): string;
    #private;
}
import DayFormatType from './DayFormatType.js';