Long Date Formats1.1.0+

  1. // From 2.12.0 onward
  2. moment.updateLocale('en', {
  3.     weekdaysMin : String[]
  4. });
  5. moment.updateLocale('en', {
  6.     weekdaysMin : Function
  7. });
  9. // From 2.8.1 to 2.11.2
  10. moment.locale('en', {
  11.     longDateFormat : Object
  12. });
  14. // Deprecated in 2.8.1
  15. moment.lang('en', {
  16.     longDateFormat : Object
  17. });

Locale#longDateFormat should be an object containing a key/value pair for each long date format L LL LLL LLLL LT LTS. LT should be the time format, and is also used for moment#calendar.

  1. moment.updateLocale('en', {
  2.     longDateFormat : {
  3.         LT: "h:mm A",
  4.         LTS: "h:mm:ss A",
  5.         L: "MM/DD/YYYY",
  6.         l: "M/D/YYYY",
  7.         LL: "MMMM Do YYYY",
  8.         ll: "MMM D YYYY",
  9.         LLL: "MMMM Do YYYY LT",
  10.         lll: "MMM D YYYY LT",
  11.         LLLL: "dddd, MMMM Do YYYY LT",
  12.         llll: "ddd, MMM D YYYY LT"
  13.     }
  14. });

You can eliminate the lowercase l tokens and they will be created automatically by replacing long tokens with the short token variants.

  1. moment.updateLocale('en', {
  2.     longDateFormat : {
  3.         LT: "h:mm A",
  4.         LTS: "h:mm:ss A",
  5.         L: "MM/DD/YYYY",
  6.         LL: "MMMM Do YYYY",
  7.         LLL: "MMMM Do YYYY LT",
  8.         LLLL: "dddd, MMMM Do YYYY LT"
  9.     }
  10. });