That depends entirely on the shipping company. Fedex and UPS for example, unless you're a business or have paid for high priority shipping, Saturday doesn't count. Your package may still transfer over the course of Saturday, but odds are it will sit in a limbo from Friday evening to Monday morning. Something like this would end up arriving likely via USPS though, and USPS still operates completely on Saturday, so you can safely count that as one of the days.
Don't get snippity just because I don't possess all the knowledge about this particular shop. My guess would have been perfectly accurate, and it was reasonable to assume that an item shipping out of Canada as small as a flash cart kit would ship via local post transferred to USPS. No need to edit your post specifically to be an ass over a single day difference.
