Change the dates returned by Tumblr's tweet.js callback to something like 12:00 PM Oct. 27th

prettyTweetDateForTumblr.js

var prettyTweetDate = function (tweetDateFromJSON) {
  var createDate = Date.parse(tweetDateFromJSON),
  tweetDate = new Date(createDate),
  tweetDateNum = tweetDate.getDate(),
  tweetHours = tweetDate.getHours(),
  tweetAMPM = (tweetHours < 12) ? "AM" : "PM",
  tweetDateSuffix = "",
  prettyTweetDateString = "",
  months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"];

  tweetHours = (tweetHours < 13) ? tweetHours : tweetHours - 12;
  if (tweetDateNum === 1 || tweetDateNum === 21 || tweetDateNum === 31) {
    tweetDateSuffix = "st";
  } else if (tweetDateNum === 2 || tweetDateNum === 22) {
    tweetDateSuffix = "nd";
  } else if (tweetDateNum === 3 || tweetDateNum === 23) {
    tweetDateSuffix = "rd";
  } else {
    tweetDateSuffix = "th";
  }
  prettyTweetDateString += tweetHours + ":" + tweetDate.getMinutes() + " " + tweetAMPM + " " + months[tweetDate.getMonth()] + " " + tweetDateNum + tweetDateSuffix;
  return prettyTweetDateString;
};