I belong to the Religious…

I belong to the Religious Society of Friends (“Quakers”). On our printed calendars, and in our written and spoken language, we use numbers, not pagan, names for the days of the week and the months of the year. This has Biblical precedent. For instance, the general English name for today is “Sunday,” and for this month is “June.” I would say today is First Day and that the month is Sixth Month. I would like to be able to use a calendar pluginPlugin A plugin is a piece of software containing a group of functions that can be added to a WordPress website. They can extend functionality or add new features to your WordPress websites. WordPress plugins are written in the PHP programming language and integrate seamlessly with WordPress. These can be free in the WordPress.org Plugin Directory https://wordpress.org/plugins/ or can be cost-based plugin from a third-party that allows be to use these names. Must I create a new English localeLocale Locale = language version, often a combination of a language code and a region code, for instance es_MX denotes Spanish as it’s used in Mexico. A list of all locales supported by WordPress in https://make.wordpress.org/polyglots/teams/ to do this, or does some one know of a plugin in that will allow me to do it just within the plugin itself?