Wikipedia:Selected anniversaries/February 23

February 23: Defenders of the Motherland Day in Russia (1918), Mashramani in Guyana (1970), Fat Thursday in Poland (2006).

• 1455 - Johann Gutenberg in Mainz began printing the Gutenberg Bible.
• 1893 - Rudolf Diesel received a patent for the diesel engine.
• 1903 - Guantánamo Bay, Cuba was perpetually leased to the United States.
• 1945 - Joe Rosenthal took the Pulitzer Prize-winning photograph Raising the Flag on Iwo Jima, an image that was later reproduced as the U.S. Marine Corps War Memorial (pictured).
• 1947 - The International Organization for Standardization (ISO) was founded. It is responsible for worldwide industrial and commercial ISO standards.

Recent days: February 22 – February 21 – February 20

More anniversaries:

• January 31
• February 1
• February 2