Modification to https://github.com/defmethodinc/just-not-sorry to check dates

WarningChecker.js

addWarning(node, regex, message) {
  // create regex with a gontext group and insede a date regex group
  const pattern = new RegExp('([^.,;\\n]*(' + regex + ')[^.,;\\n]*)', 'ig');
  
  const promises = [];
  const warningClass = this.warningClass;
  const promisifiedMatchCallback = (match, range) => {
    // parse teh date - use just the default parses
    const date = new Date(Date.parse(match[2]))

    // check if there is any day name present in the date context
    const text = match[1].toLowerCase()
    DAY_NAMES.forEach(function (dayName, index) {
      if (text.includes(dayName)) {
        if (index !== date.getDay()) {
          // create the mighlighting with a mesage
          const matchPromise = HighlightGenerator.highlightMatches(
            `The date '${match[2]}' is not a '${DAY_NAMES[index]}' but it is a '${DAY_NAMES[date.getDay()]}'`,
            warningClass,
            node
          ).call(node, match, range);
          promises.push(matchPromise);
        }
      }
    });

    // ignore the hour
    date.setHours(0,0,0,0)
    
    // search through all saved events from Google calendar
    events.forEach( event => {
      if (event.date.getTime() === date.getTime()) {
        // create the mighlighting with a mesage
        const matchPromise = HighlightGenerator.highlightMatches(
          `You have an event on that date '${match[2]}'. '${event.name}'`,
          warningClass,
          node
        ).call(node, match, range);
        promises.push(matchPromise);
      }
    })
  };
  
  domRegexpMatch(node, pattern, promisifiedMatchCallback);
  return Promise.all(promises);
}