export declare const TIME_ZONE_OFFSET: number;
export declare const CHINESE_OFFSET: number;
export declare function countDaysOnYear(year: number): number;
export declare function isNewMoon(date: Date): boolean;
export declare function countNewMoons(fromDate: Date, toDate: Date): Array<Date>;
export declare function getWinterSolstice(year: number): Date;
export declare function getWinterSolsticeRange(date: Date): Array<Date>;
export declare function isMissingMidTermMonth(date: Date): boolean;
export declare function isLeapMonth(date: Date): boolean;
export interface OLunarYear {
    readonly sexagesimal: () => string;
    readonly zodiac: () => string;
    readonly toString: () => string;
    readonly valueOf: () => number;
}
export interface OLunarMonth {
    readonly capital: () => string;
    readonly isLeap: () => boolean;
    readonly sexagesimal: () => string;
    readonly toString: () => string;
    readonly valueOf: () => number;
}
export interface OLunarDay {
    readonly capital: () => string;
    readonly sexagesimal: () => string;
    readonly toString: () => string;
    readonly valueOf: () => number;
}
/**
 * @description 8h = 28800000ms, minus 8 hours to get china time zone date.
 */
export declare class ChineseDate extends Date {
    /**
     *
     * @returns A new instance of LunarYear.
     */
    getLunarYear(): OLunarYear;
    /**
     * @description A lunar month is 11 if winter solstice is in this month.
     * @returns A new instance of LunarMonth.
     */
    getLunarMonth(): OLunarMonth;
    /**
     *
     * @returns A new instance of LunarDay.
     */
    getLunarDay(): OLunarDay;
    toChineseString(): string;
    toLunarString(): string;
}