For extra guidance, please see WPBeginner's tutorial on adding custom code.
If you'd like to localize the language strings used in the Date Picker, we have a separate tutorial with more details.
By adjusting the code below, you can modify or translate the strings used for days and months in the calendar, as well as adjust the first day of the week.
In this example, we've translated the days and months into French and also changed the first day of the week to Monday.
* Translate strings for WPForms date picker and modify first day of week.
// Modify strings used for days of week.
// Modify strings used for months.