import { DateInput, MaybeDateInput } from './types.js';

/**
 * Returns the difference between 2 dates in years.
 * @param dateA - A date to compare with the dateB date
 * @param [dateB] - A date to compare with the dateA date or nothing to compare with the current time
 */
declare function diffYears(dateA: DateInput, dateB?: MaybeDateInput): number;
/**
 * Returns the difference between 2 dates in years.
 * @param [dateA] - A date to compare with the dateB date or null to compare with the current time
 * @param dateB - A date to compare with the dateA date
 */
declare function diffYears(dateA: MaybeDateInput, dateB: DateInput): number;

export { diffYears };