Here is how I would do it. Select Tools -> Customize -> Toolbars (tab) and
check Control Toolbox. This will bring up the Control Toolbox Toolbar. Click
the icon that looks like a Hammer and Wrench. From the list choose Microsoft
Date and Time Picker Control. Your cursor will change to a cross hair that
you can use to draw the control (the same way you would draw a rectangle
using click and drag). Right click the control and select Properties. Add a
cell reference (such as A1) to the Linked Cell property. Now to get out of
design mode click on the Triangle & Ruler icon on the control toolbox
toolbar.