A Dubliner boards a bus and asks the driver how long the trip is between Limerick and Cork.
“It’s about 2 hours,” says the driver.
“Thanks,” says the Dubliner. “Well then how long is the trip between Cork and Limerick?”
The driver is now a little angry, and says “It’s still about 2 hours. Why do you think there would be a difference?”
“Well,” says the Dubliner , “It’s only a week between Christmas and New Year, but it’s an awful lot longer than that between New Year and Christmas!”