/**
 * Returns true when the given date is a weekday and not in the holidays list.
 * @param {Date} date - The date to check
 * @param {Date[]} [holidays=[]] - Optional list of holiday dates
 * @returns {boolean} True when weekday and not a listed holiday
 * @example
 * isBusinessDay(new Date("2025-04-21")); // true (Monday)
 * isBusinessDay(new Date("2025-04-21"), [new Date("2025-04-21")]); // false
 */
export declare const isBusinessDay: (date: Date, holidays?: Date[]) => boolean;