What are Moments and when are they used / needed?

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Just found it

How to get date with st nd or th using formatdate

Here a custom formatter that uses moment.js for formatting the date. Place following script in a js file or script block: dmx.Formatter('string', 'formatDate2', function(val, format) { return moment(val).format(format); }); Now use it like: {{ next_birthday.formatDate2("dddd, MMMM Do YYYY") }}