CHICAGO (CBS) — All the zip codes in Chicago start with 606. As a date, that would be June 6th.
On the northwest side, one of the zip codes is 60618.
That lines up with the date and year.
So the folks at the Daniel Doffyn Post Office are celebrating this quirk of the calendar with Zip Code Day.
A special postmark, stamped by hand in the 60618 on Wednesday, complete with Mr. Zip, a cartoon character dating back to the 1960s.
“If we didn’t have no zip code there would be no system,” said Martin Allen Jones, who’s been delivering mail for almost 35 years. The past 30 years in the 60618 zip code.