a. Click on the "Layout" section of your report project in the Report 
you wish to have the Calendar Control.

b. Right-Click in the "white space" of the report (outside of the report's header, body, and footer).

c. Click on Report Parameters

d. Select the Parameter you wish to have the Calendar Control

e. For the Data type: under the Properties pane to the right, select DateTime from the drop-down list.

f. Click OK

g. Run your report! You'll see the Calendar Control to the right of the Date Parameter textbox.

h. Do steps a-f with each Date Parameter included in your report.