/**
 * Returns the number of days between two dates.
 *
 * @example
 * daysBetween("2024-01-01", "2024-01-10") // 9
 *
 * @param date1 The first date to compare.
 * @param date2 The second date to compare.
 * @returns The absolute number of days between the two dates.
 */
export declare function daysBetween(date1: Date | string | number, date2: Date | string | number): number;