如何在JavaScript中以正确的格式格式化日期

Question

I'm working on JavaScript and stuck in a small issue.

I am receiving this date in JSON response 1322919399447-0500

and I want to format this like: 6:50 PM, Dec 3rd 2011 .

Answer 1

I used this handy little date format addon and it worked very well for me. Even took care of the pesky internet explorer quirks with the month.

Answer 2

I'm not sure if this is the best way (I'm sure it's not, actually), but essentially you can make that datestring into a js Date object, then pull out the pieces to manipulate as you see fit:

var dateThing = new Date(1322919399447-0500);
dateThing.getFullYear(); // 2011
dateThing.getDay(); // 6
dateThing.getDate(); // 3
dateThing.getMonth(); // 11
dateThing.getHours(); // 8 (test for anything over 12, that indicates PM)
dateThing.getMinutes(); // 36

Then you can concatenate those pieces into your own format. Like I said, there's probably a better way, but this works in a pinch.

Answer 3

Here is the snippet with your example input. It is using script linked by Zoidberg .

This code returns formatted UTC date. If you want your local date then remove UTC: from the return statement.

function convertTime(dateString) {
  // get ms part from the string
  var milis = +dateString.substring(0, 13);
  // get timezone part as "# of hours from UTC", e.g. "-0500" -> -5
  var offset = +dateString.substring(13, 16);
  // move the time for "offset" number of hours (to UTC time)
  var date = new Date(milis - offset * 3600000);
  // using http://stevenlevithan.com/assets/misc/date.format.js
  return date.format("UTC:h:MM TT, mmm dS yyyy");
}

EDIT : Changed + offset * to - offset * as we want to normalize to UTC.

Answer 4

This is a similar date format function I created that uses the same flags that PHP's date function uses.

PHP date function in Javascript