code: function addCoreFormats() {
          forEach(CoreParsingFormats, function(df) {
            var src = df.src;
            if (df.localeCheck && !df.localeCheck(loc)) {
              return;
            }
            if (df.mdy && loc.mdy) {
              // Use the mm/dd/yyyy variant if it
              // exists and the locale requires it
              src = df.mdy;
            }
            if (df.time) {
              // Core formats that allow time require the time
              // reg on both sides, so add both versions here.
              loc.addFormat(getFormatWithTime(src, true));
              loc.addFormat(getFormatWithTime(src));
            } else {
              loc.addFormat(src);
            }
          });
          loc.addFormat('{time}');
        }
docs: -- Format adding helpers