What method can be used to ensure Moment.js gives priority to the day over the month when interpreting dates with ambiguity

Is there a way to set Moment.js to default to assuming that the day comes before the month in ambiguous situations?

For instance:

  • moment("10-05-2018") would interpret as 10 May 2018
  • moment("06/08/2018") would be assumed as 06 August 2018
  • moment("01 03 2018") would display as 01 March 2018

Answer №1

Utilize the moment(String, String) function, with DD representing the day of the month, MM for the month number, and YYYY for a 4 or 2 digit year.

Keep in mind that if your input doesn't follow recognized ISO 8601 or RFC 2822 formats, it's advisable to use moment(String, String) instead of moment(String) for consistent results on different browsers.

When converting a string into a moment, the process involves checking if it matches known ISO 8601 formats first, then the RFC 2822 Date time format before resorting to new Date(string) when a recognized format isn't identified.

Attention: Browser support for parsing strings varies widely as there is no set standard for supported formats. Thus, what works in one browser may not work in another.

To ensure consistent results when parsing non-ISO 8601 strings, prefer using String + Format.

Check out a live example below:

["10-05-2018","06/08/2018", "01 03 2018"].forEach( (item) => {
  console.log( moment(item, 'DD MM YYYY').format() );
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.24.0/moment.min.js"></script>

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