declare type Options = {
    /** Use the UTC timezone */
    UTC?: boolean;
};
/**
 * Determine if a year is a leap year
 *
 * @param input A date, or a year number
 * @param __namedParameters see {@link Options}
 * @returns true, if the specified year is a leap year
 */
export declare function isLeapYear(input: Date | number, { UTC }?: Options): boolean;
export default isLeapYear;