Wikipedia:Selected anniversaries/January 7

January 7: Christmas (Christianity-Julian calendar).

Francis, Duke of Guise

• 1558 - Francis, Duke of Guise (pictured) retook Calais, England's last continental possession, for France.

• 1610 - Galileo Galilei first observed the Jovian satellites Io, Europa and Callisto through his telescope.

• 1785 - Frenchman Jean-Pierre Blanchard and American John Jeffries became the first to cross the English Channel by balloon.

• 1975 - OPEC cut production, raising the price of crude oil by 10 percent.

• 1979 - Phnom Penh fell to the People's Army of Vietnam, effectively ending the Democratic Kampuchea regime.

Recent days: January 6 – January 5 – January 4

More anniversaries:

• December 31
• January 1
• January 2