LOL! Jazzy....theres nothing like a "STUPID" question in this world.....if it is a question or a query it cant b 'Stupid' .....so relax.......but answering your query.....I havent been to Canada till now....but as I was living in different parts of Europe for last 4 years and climate is pretty much similar to canadian climate so I can certainly assure you that Pakistani jeans should work in Canada as fine as they used to work in Europe ( I am saying all this because I had many Pakistani friends who used to where Jeans which they used to bring in from Pakistan)
Dont worry friend you are alright with your pakistani pair of jeans and trust me all the jeans which are sold in western countries are either made in India, Bangladesh or Pakistan.... so I think there is no such thing as Pakistani jeans or Canadian jeans ,,, you can where either in Canada.
I hope answered your query in some sense
Regards!
Akshay