What is the calendar with the setting of allowed dates?

Question

JavaScript

Recommend a calendar widget, the main thing is that you can regulate which dates the user can choose.
For example, that you can choose only Saturday, and the rest of the days - no.

Answer 1

https://api.jqueryui.com/datepicker/#option-before...

Answer 2

https://github.com/xdan/datetimepicker