/**
 * RFC 6265 §5.1.1 — Cookie-date parsing algorithm.
 *
 * This is NOT Date.parse(). The RFC defines a lenient tokenizing algorithm
 * that handles the wide variety of date formats found in real-world cookies.
 * Delimiters are: TAB, space-/, ;-@, [-`, {-~
 */
/**
 * Parse a cookie date string per RFC 6265 §5.1.1.
 *
 * @returns ms epoch timestamp, or null if the date is invalid.
 *
 * @example
 *     parseDate('Thu, 01 Jan 2099 00:00:00 GMT') // → Date.UTC(2099,0,1,0,0,0)
 *     parseDate('garbage')                        // → null
 */
export declare function parseDate(str: string): number | null;