Hello!

The Microsoft Date and Time Picker Control 6.0 is not included in the default list of ActiveX controls in Excel. However, you can add it manually by following these steps:

1. Right-click on the Developer tab and select "Customize the Ribbon".
2. In the right-hand pane, select "Main Tabs" and expand the "Developer" tab.
3. Click on "Insert" and then select "ActiveX Controls".
4. Scroll down until you find "Microsoft Date and Time Picker Control 6.0" and select it.
5. Click "OK" to close the dialog box.

Now you should be able to see the Microsoft Date and Time Picker Control 6.0 in the ActiveX controls list in the Developer tab.