[petercooper]

Awesome. I never saw why the mail system should work longer than the normal working week anyway. Hopefully the UK will go the same way sometime soon. The threat of having mail turn up on a Saturday (that you might need to wait in for) isn't worth it.

[metachor]

And this is opposed to the threat of having mail that needs to be signed-for turn up at your house only on a weekday while you are at work. Currently I can tell USPS to just deliver it again when I know I will be home (on Saturday).

[petercooper]

And this is opposed to the threat of having mail that needs to be signed-for turn up at your house only on a weekday while you are at work.

Surely this is a universal and solved problem though? Most couriers (e.g. for most larger/heavier items you'd buy online) will not deliver on Saturday unless you pay quite a bit extra, so weekday-only delivery is already an institution of sorts.

That aside, maybe your issue is, secretly, USPS's primary motivation. If they don't have a Saturday service at all, people like you can't request Saturday delivery and will need to go pick up your packages from the depot. That'll save them a lot of time and money.