UPDATE:
We have batch-credited all those who are missing elevation from their rides on Monday January 24. Upon your next log in, you should see those meters added to the progress bar for your Wahoo Climbing Mission.
If you do not, and need one-on-one assistance, please use the Contact Us link on support.zwift.com if you haven’t already.
Lastly - as James stated above - the final day of the Mission has been time zone-adjusted, so no worries there either.