I need a calendar that works for rentals (renting gear). I have same day returns, so the rental will be set to 12 hours, 3 days and 7 days.
Once booked, these time slots should be blocked for that specific product.
Hi there and welcome aboard, @Yeliz_Bilgi 
At the moment, unfortunately, it’s impossible to book days, but we have this idea on the Wishlist. You can upvote it here 
- An option to book day rather than hours
To block the booked slots, you just need to connect your widget to Google Calendar:
Please let me know if this explains things or if you have any questions left 