import { JDate } from "./JDate";
export declare class GDate extends JDate {
    static make(jdate: JDate): GDate;
    static make(date: Date): GDate;
    static make(day: number, month: number, year: number): GDate;
    private constructor();
    static isLeapYear(year: number): boolean;
    static monthLength(year: number, month: number): number;
    private static hdnForYmd;
    static today(): GDate;
    getDay(): number;
    getMonth(): number;
    getYear(): number;
    plus(days: number): GDate;
    private static calcFromHdn;
    private day;
    private month;
    private year;
}