"The city and the Calgary Parking Authority are making a special effort again this year to accommodate the growing number of people who choose to use motorcycles or scooters for their downtown commute.
Approximately 75 designated on-street parking stalls are now available for motorcycles and scooters until the fall.

The designated stalls allow motorcycle and scooter operators to park all day on weekdays for $2.50 per hour to a maximum of $8."

Source: Discount Parking for Motorcycles and Scooters @ QR77 Newsroom

I would assume that the $8 covers the whole day (otherwise that's only just over 3 hours at $2.50/hour).  The question is, what consists of a whole day?  I'll try to follow up on this and get more detail.