No, it's not really more accurate. It only appears more accurate.

I have no intrinsic objection to odd sized windows, I just don't see the need. Who makes predictions that specific anyway?

"Within 12 hours, 10 minutes and 43 seconds"

I haven't seen any like that and that kind of accuracy is highly unlikely anyway.

Roger

PS: there is no bulletproof method. They all involve certain assumptions which may or may not apply and likely will not be understood by most.