It is inconvenient that I cannot open Date and Time Properties as non-admin.  Non-admins should not be able to change the date and time, but should be able to view it.  Sometimes, I want to see what the date of next Wed is.  Now I need to practice doing math in my brain if I run as non-admin.  :)

Instead of using my rusty brain, I just grant myself "Change the System Time" privilege via Local Security Policy.
   1. Open Local Security Policy
   2. Go to Local Policies -> User Rights Assignment
   3. Double-click on "Change the system time"
   4. Follow the GUI to add myself to the privilege