> "2 days from now" could either mean "after 2*86400 seconds have ticked" or it could mean "when the wall clock looks like it does now, after 2 sunset events".

> "2 days from now" could either mean "after 2*86400 seconds have ticked" or it could mean "when the wall clock looks like it does now, after 2 sunset events". These are not the same thing. Which is why you need some means to specify which one you want from the library that converts from the monotonic counter to calendar dates. Anyone who tries to address the distinction by molesting the monotonic counter is doing it wrong.