They're f*cking with you to try to save having to give you back your money. The clock starts with an origin scan, which they should have done in front of you. I bet the delivery guarantee is three days from that location, i.e., Friday. If the origin scan is done after 3pm (usually) today, then the three days becomes Monday. Tip: Canada Post misses their delivery guarantee on parcels quite often. I have gotten my money back 80% of the time in the past. Submit a claim online if it happens - and you'll get a cheque to in the mail.

(There are no delivery standards to the States - it'll take about 10 days for the parcel to get to Whale.)