formatRFC7231
import { formatRFC7231 } from "https://esm.sh/v135/date-fns@3.6.0/index.d.mts";@example
// Represent 18 September 2019 in RFC 7231 format:
const result = formatRFC7231(new Date(2019, 8, 18, 19, 0, 52))
//=> 'Wed, 18 Sep 2019 19:00:52 GMT'
function formatRFC7231<DateType extends Date>(date: DateType | number | string): string;