If you use Uber and are also an AIR MILES collector, you’re going to appreciate this news. Both companies have announced a partnership, with new users earning 100 Miles after their first rides.

Also, today-only Uber will offer mystery bonus miles for select cities in Canada:

Today only, to celebrate, we’re placing special AIR MILES cards in cars in Toronto, Ottawa, Edmonton, Montreal, and Quebec City. Request your Uber, and you’ll be gifted a special mystery amount of Miles from your driver!

How to get your special mystery Miles for today? Just enter promo code AIRMILES at 5PM local time in the Uber app, located under the promo tab on the top left to unlock the AIR MILES option. Uber says there are also two bonus amounts of free North America round-trip flights. Demand for AIR MILES will be “extremely high” and be in limited supply.

Earlier today, UberX launched service in Calgary, with rides set to start at 2PM local time.