Reformatting date string

Question

Given input like "Tue Aug 30 2011 11:47:14 GMT-0300", I would like output like "MMM DD YYYY hh:mm".

What is an easy way to do it in JavaScript?

You don't need a regex to parse the date string, just ask the date object for the year, month, day, etc. See this question for more info. Also, check out Datejs. — gen_Eric
– gen_Eric, Commented Aug 30, 2011 at 14:55
If I'm grabbing said date from a database like SharePoint, *hits the dirt inside a premade Fallout vault* and it is in format yyyy-dd-MM HH:mm:ss:SSSS, which of these solutions is going to work best? — HadesHerald
– HadesHerald, Commented Jul 7, 2015 at 22:12

Mrchief · Accepted Answer · 2011-08-30 15:09:04Z

Via JS, you can try converting it to a date object and then extract the relevant bits and use them:

var d = new Date ("Tue Aug 30 2011 11:47:14 GMT-0300") d.getMonth(); // gives you 7, so you need to translate that

To ease it off, you can use a library like date-js

Via regex:

/[a-zA-Z]{3} ([a-zA-Z]{3} \d{2} \d{4} \d{2}:\d{2})/ should do the trick.

var r = "Tue Aug 30 2011 11:47:14 GMT-0300".match(/^[a-zA-Z]{3} ([a-zA-Z]{3} \d{2} \d{4} \d{2}:\d{2})/); alert(r[1]); // gives you Aug 30 2011 11:47

fbstj · Accepted Answer · 2011-08-30 14:57:44Z

check out Date.parse which parses strings into UNIX timestamps and then you can format it as you like.

gen_Eric · Accepted Answer · 2011-08-30 15:07:34Z

If you don't mind using a library, use Datejs. With Datejs, you can do:

new Date ("Tue Aug 30 2011 11:47:14 GMT-0300").toString('MMM dd yyyy hh:mm');

Joao Costa · Accepted Answer · 2011-08-30 15:11:34Z

A sample function:

function parseDate(d) { var m_names = new Array("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"); var curr_day = d.getDate(); var curr_hours = d.getHours(); var curr_minutes = d.getMinutes(); if (curr_day < 10) { curr_day = '0' + curr_day; } if (curr_hours < 10) { curr_hours = '0' + curr_hours; } if (curr_minutes < 10) { curr_minutes = '0' + curr_minutes; } return ( m_names[d.getMonth()] + ' ' + curr_day + ' ' + d.getFullYear() + ' ' + curr_hours + ':' + curr_minutes); } alert(parseDate(new Date()));

Or have a look at http://blog.stevenlevithan.com/archives/date-time-format for a more generic date formatting function

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