Zebedee B. Armstrong aka Z.B. Armstrong, was an outsider artist best known for his doomsday

Doomsday event

A doomsday event is a specific, plausibly verifiable or hypothetical occurrence which has an exceptionally destructive effect on the human race...

 calendars.

Armstrong was born in Thomson, Georgia

Thomson, Georgia

Thomson, incorporated February 15, 1854, is a city in McDuffie County, Georgia, United States. The population was 6,828 at the 2000 census. The city is the county seat of McDuffie County. Thomson's nickname is "The Camellia City of the South", in honor of the thousands of camellia plants...

. He went to school until eighth grade. He married in 1929 and had two daughters. For much of his life, he worked picking cotton on the local Mack McCormick farm. After his wife died in 1969, he began to work at the Thomson Box Factory, staying there until 1982.

Art

In 1972, he claimed to be visited by an angel who warned him that the end of world was coming soon. Armstrong began to construct various "doomsday calendar" calculating machines that would attempt to determine the exact date. Many of the calendars are made of wood and have clocklike designs with hands used to calculate dates.