For one morning only, Starbucks Canada is offering you a free pastry of your choice, when you purchase a hand-crafted, brewed, or iced-beverage!
This event will be happening on the morning of Tuesday, the 23rd March 2010. Print out your coupon and take it with you on that day. It will only be valid between 4am or opening time, to 10.30am in the morning, so you will have to get there fairly early - perhaps on your way to work?
From the list of coffees available, that sounds like you can get the free pastry with any purchase there.
Thanks for the email Camille!