Date string parsing w/ Luxon

index.cjs

const { DateTime } = require("luxon");

const start = parseDateTime("Thu Apr 13", "1pm");
const end = parseDateTime("Mon Dec 19 2022", "4pM");
console.log(`${start} -- ${end}`);

function parseDateTime(dateString, timeString) {
  const CURR_YEAR = new Date().getFullYear();
  const DATE_FORMAT = /* ccc */ "LLL d yyyy";
  const TIME_FORMAT = "h:mma";
  const [, month, day, year = CURR_YEAR] = dateString.split(" ", 4);
  if (!timeString.includes(":")) {
    timeString = timeString.replace(/^(\d+)(am|pm)$/i, "$1:00$2");
  }
  return DateTime.fromFormat(
    `${month} ${day} ${year} ${timeString}`,
    `${DATE_FORMAT} ${TIME_FORMAT}`
  ).toJSDate();
}