Add a Calendar

I am hoping to use this plugin in a project I’m currently working on.
The project involves the user to choose a start date and end date then a different package to go on (as the price will be different if it’s the weekend and depending on the package they choose).

I have set everything up so far and all works a treat, but I was wondering to make the font end and back end easier, is there a way to add a calendar function/plugin/add on to this plugin?

Cheers

https://www.ads-software.com/plugins/wp-e-commerce/