/*!
 * Portions Copyright (c) 2019 MagicStack Inc. and the Gel authors.
 * Portions Copyright (c) 2001-2019 Python Software Foundation.
 * All rights reserved.
 * Licence: PSFL https://docs.python.org/3/license.html
 */
export declare function isLeapYear(year: number): boolean;
export declare function daysInMonth(year: number, month: number): number;
export declare function daysBeforeMonth(year: number, month: number): number;
export declare function ymd2ord(year: number, month: number, day: number): number;
export declare function ord2ymd(n: number): [number, number, number];