You've spent tremendous effort in earning those rewards during the last Holiday Ops, so don't let them go to waste!
All unclaimed rewards will be removed when the servers go under maintenance for 1.0's release (date/time TBA), so this is your last chance at gathering the fruits of your labour before it all disappears.
How to claim your Holiday Ops rewards
Step 1: Go to the Notification Centre in your Garage.
Step 2: Click on the "To Rewards" button to bring up the Holiday Ops rewards menu.
Step 3: Claim your rewards!