How to make "Calendar" for R Shiny application ?

There are a lot of JS libraries for making Calendar in web applications.

How to make an elegant Calendar solution with labeling dates like in Google Calendar for R Shiny applications?

Thanks!

I haven’t seen anything but that would be a cool htmlwidget.

Here is something along those lines:
http://www.roymfrancis.com/calendar-plot-shiny-app-and-dynamic-ui/