星期缩写

Locale#weekdaysShort 应该是星期缩写的数组。

¥Locale#weekdaysShort should be an array of the weekdays abbreviations.

This requires the UpdateLocale plugin to work

dayjs.extend(updateLocale)

dayjs.updateLocale('en', {
  weekdaysShort: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"]
})