Since the last snapshot at least, clocks in item frames will always show the same time (mid-day), no matter what time of day it really is.
(Compare the clock in the inventory with the one visible at the right in the screenshot)
Environment
Linux (Kubuntu 15.10)
Oracle Java 1.8.0_66
Thank you for your report.
However, your ticket has been resolved as a duplicate.
This issue has been linked to the original bugreport: MC-85029. You can find or add further information on that report.
Please search before reporting any bugs, as it's likely that one exists already.