Why would you even consider a carry trade on those pairs?! A simple Google for "world interest rates" provides you with plenty of exotics with sizable interest rate differences.
Thank you for clarifying. What constitues a "day"? Does it depend on market close of the respective currency? i.e. I hold USD @ time of market close in NY. I am then paid any positive carry on open positions at that time?
Oh and don't forget, the fancy idea of buying at 3:59pm and holding to 4:01pm doesn't work due to spreads costing more than the carry pays, even on tight pairs with the best rates. No free lunch.