A Michigan history blog pulling together anecdotes about Michigan-related events and stories arranged by date, compiled by Jon Harrison, a retired librarian who used to work for the Michigan State University Libraries. Some of the other works that offered inspiration:
Awesome Stories Calendar Stories of the Month, focusing on national and world events.
This Day in History, courtesy of History Channel, focusing on national and world events.
Other noteworthy compilations of Michigan historical events:
Historical Dates in Michigan’s History, courtesy of the Clarke Historical Library at Central Michigan University.
On This day in Detroit History / Bill Loomis ; photography by Barney Klein. Charleston, SC : The History Press, 2016.
It Happened in Michigan : Remarkable Events That Shaped History / Colleen Burcar. Globe Pequot; 1st edition, 2011.
Michigan Every Day / Patrick Sullivan and Carole Eberly. Elberta, MI : Eberly Press, 
This is Detroit, 1701-2001 / Arthur M Woodford. Detroit : Wayne State University Press, 
Mich-again’s day : a panorama of major and trivial, human-interest and historical, and informative and entertaining events that have taken place on each of Michigan’s past days / by Gary W. Barfknecht. Davison, Mich. : Friede Publications, 
Social Media :
Central Michigan University, Clarke Historical Library tweets
Central Michigan University, Clarke Historical Library, Day in Michigan History tweets
History Lives Detroit Tweets by Ken Coleman.
University of Michigan Bentley Historical Library Facebook page.
#OTD, covering national and world events primarily.