Thank you for your post.
At this time, the keyboard always appears for fields that require data entry, even when the field is set to pop-up (calendar/text). I recommend that you enter this suggestion into our Feature Requests web form at:
The entries into this web form are read by both Development and Product Management where the entries are discussed and considered for future releases. Although it would be easy for me to copy your post and paste it into the web form, there are a couple of questions asked that only you can answer.
I will submit a Feature Request now.
Hmm, you might want to try using a PopOver that displays a calendar like "date picker" where you click buttons to set the date. This would take a bit of doing in order to set up the calendar grid, but it could be done without entering a field for editing and thus would keep the keyboard from deploying.