Is there a HTML code for a monthly calendar with checkboxes for everyday?

I am looking for some help. I have a leadpages website and I am looking to add a live calendar to my website which has a checkbox on each day for my clients to tick whether they did their daily habit.

Leadpages hasn’t got a calendar function but has a custom HTML widget button which I was hoping to use to insert this calendar. I just need help with what the code would be to make something like this - would love some help with this!

Please contact me or reply if you can help me with this!

I will attach a photo of what I would like or similar! 👇

Calendar example