The Saturday Evening Post is a bimonthly American magazine

Magazine

Magazines, periodicals, glossies or serials are publications, generally published on a regular schedule, containing a variety of articles. They are generally financed by advertising, by a purchase price, by pre-paid magazine subscriptions, or all three...

. It was published weekly under this title from 1897 until 1969, and quarterly and then bimonthly from 1971.
While the publication traces its historical roots to Benjamin Franklin

Benjamin Franklin

Dr. Benjamin Franklin was one of the Founding Fathers of the United States. A noted polymath, Franklin was a leading author, printer, political theorist, politician, postmaster, scientist, musician, inventor, satirist, civic activist, statesman, and diplomat...

, The Pennsylvania Gazette

Pennsylvania Gazette (newspaper)

The Pennsylvania Gazette was one of the United States' most prominent newspapers from 1728, before the time period of the American Revolution, until 1815...

was first published in 1728 by Samuel Keimer, The following year (1729), Franklin acquired the Gazette from Keimer for a small sum and turned it into the largest circulation newspaper in all the colonies.