This refers to an old and very silly song by J. Kendis and Lew Brown, which goes:
When it’s night-time in Italy, it’s Wednesday over here.
Oh! the onions in Sicily make people cry in California.
Why does a fly? When does a bee?
How does a wasp sit down to have his tea?
If you talk to an Eskimo, his breath will freeze your ear.
When it’s night-time in Italy, it’s Wednesday over here.