Why calendar report option does not appear for all my forms?

Just spotted the new Calendar report, which is awesome.  I have used this for one Jotform survey and it's great but when I go to one of my other surveys the option of this report is not there.

Why is???  Is there a work around??

Many Thanks

Will 

Please, do note that to create a calendar report for a form you need to have at least one date field in the form, this is required to create the report. 

Please, add one to your form and the calendar option should appear then, if this is not the case, please let us know and provide us the form where you're working on. We will be glad to help. 

Hi there

The form below is older but does have date pickers in but no calendar report available.

https://form.jotform.com/61093943899977

Thanks 

will

You have widgets on that form, even though they're calendars they are not recognized by the calendar report. 

To get the calendar report it's required to add the date picker field under the basic fields: 

Once you add the basic date picker field the calendar report option will appear for your form.