discourse/config/locales/client.en_US.yml

en_US:
  js:
    dates:
      # Use Moment.js format string: https://momentjs.com/docs/#/displaying/format/
      time: "h:mm a"
      # Use Moment.js format string: https://momentjs.com/docs/#/displaying/format/
      time_short_day: "ddd, h:mm a"
      # Use Moment.js format string: https://momentjs.com/docs/#/displaying/format/
      timeline_date: "MMM YYYY"
      # Use Moment.js format string: https://momentjs.com/docs/#/displaying/format/
      long_no_year: "MMM D h:mm a"
      # Use Moment.js format string: https://momentjs.com/docs/#/displaying/format/
      long_no_year_no_time: "MMM D"
      # Use Moment.js format string: https://momentjs.com/docs/#/displaying/format/
      full_no_year_no_time: "MMMM Do"
      # Use Moment.js format string: https://momentjs.com/docs/#/displaying/format/
      long_with_year: "MMM D, YYYY h:mm a"
      # Use Moment.js format string: https://momentjs.com/docs/#/displaying/format/
      long_with_year_no_time: "MMM D, YYYY"
      # Use Moment.js format string: https://momentjs.com/docs/#/displaying/format/
      full_with_year_no_time: "MMMM Do, YYYY"
      # Use Moment.js format string: https://momentjs.com/docs/#/displaying/format/
      long_date_with_year: "MMM D, 'YY LT"
      # Use Moment.js format string: https://momentjs.com/docs/#/displaying/format/
      long_date_without_year: "MMM D, LT"
      # Use Moment.js format string: https://momentjs.com/docs/#/displaying/format/
      long_date_with_year_without_time: "MMM D, 'YY"
      # Use Moment.js format string: https://momentjs.com/docs/#/displaying/format/
      long_date_without_year_with_linebreak: "MMM D <br/>LT"
      # Use Moment.js format string: https://momentjs.com/docs/#/displaying/format/
      long_date_with_year_with_linebreak: "MMM D, 'YY <br/>LT"

      tiny:
        # Use Moment.js format string: https://momentjs.com/docs/#/displaying/format/
        date_month: "MMM D"
        # Use Moment.js format string: https://momentjs.com/docs/#/displaying/format/
        date_year: "MMM 'YY"
      medium:
        # Use Moment.js format string: https://momentjs.com/docs/#/displaying/format/
        date_year: "MMM D, 'YY"