display day and month, without a year according to locale

Question

Is there any better way for getting only day and month from a date including location appropriate separator?

I have a solution that gets separator first:

Answer 1

As stated in the linked question: One way to do what you need is getting localized longDateFormat and then remove the year part with a regular expression.

Daniel T. highlighted in comments that the solution will not work in locales like en-CA, so I'm going to provide an updated solution that takes in account some other locales that starts with year part.

Probably there are some other locales the are not convered with /.YYYY/ and /YYYY./ RegExp, if you need to support every locale you can target them with ad hoc condition, as I made for ar-ly in the following snippet.

Here a code sample the shows possible output in various locales:

function changeLang(value){
  moment.locale(value);
  
  // Get locale data
  var localeData = moment.localeData();
  var format = localeData.longDateFormat('L');
  
  // Manage custom cases
  if( value === "ar-ly"){
    format = 'D/\u200FM';
  }
  // if( value === ...) possible othter cases
  
  // Check locale format and strip year
  if( format.match(/.YYYY/g) ){
    format = format.replace(/.YYYY/, '');
  }
  if( format.match(/YYYY./g) ){
    format = format.replace(/YYYY./, '');
  }

  var res = moment().format(format);
  
  $("#result").html(res);
}

  EN
  en-CA (Canada)
  eo (Esperanto)
  DE
  IT
  hu (Hungarian)
  ja (Japanese)
  lv (Latvian)
  FR
  zh-hk - Chinese (Hong Kong)
  ar-ly - Arabic (Lybia)