October - specifically the 12th.
Columbus Day is celebrated in the United states in October. In 2014, Columbus Day will be on Monday, October 13th.
Colorado was the first state to celebrate Columbus Day. They celebrated it in 1906.
Massachusetts
Columbus Day
Veterans Day is celebrated on the 11th of November.
In Canada and US Labor day is celebrated on the first Monday in September and in most of the other countries it's on 1st May.
Most US schools are closed for the Columbus Day holiday. The US is the only country where this is true.
In US, Veteran's Day was originally "Armistice Day", observing the end of WWI by Armistice on the 11th hour of the 11th day of the 11th month, 1918.
Oddly enough, International Pizza Day is celebrated on 9 February, a day that doesn't fall within National Pizza Month, which is October in the US.
On the second Monday in October, Canada celebrates Thanksgiving Day, while the United States observes Columbus Day. Columbus Day honors Christopher Columbus's arrival in the Americas in 1492 and is recognized as a federal holiday in the U.S., though some states and communities have chosen to celebrate it as Indigenous Peoples' Day instead.
Women History month is celebrated to honor women and to appreciate what they did for us.
It took place at 11 A.M. on November 11 -the eleventh day of the eleventh month of 1918.