You can add month names to the locale customization.

This method helps in customizing the month abbreviations.

This method helps in customizing the weekdays names as per locale.

This method helps in customizing the weekday abbreviations based on the locale set.

This method helps in customizing the Minimal Weekday abbreviations based on the locale set.

This method helps in customizing longdateformat for a locale.

This method helps in obtaining the relative time.

This method helps in customizing the meridiem as per locale.

You can parse AM/PM using this method.

This helps in customizing calendar object for a locale set.

The ordinal display for dates can be changed based on locale.

This is used with duration.humanize where the length of duration is displayed as a few seconds ago, in a minute, an hour ago etc.