Juneteenth
(June 19th)
Officially Juneteenth National Independence Day is a federal holiday in the United States commemorating the emancipation of enslaved African-Americans. It is also often observed for celebrating African-American culture.[Originating in Galveston, Texas, it has been celebrated annually on June 19 in various parts of the United States since 1865. The day was recognized as a federal holiday on June 17, 2021, when President Joe Biden signed the Juneteenth National Independence Day Act into law.  Juneteenth's commemoration is on the anniversary date of the June 19, 1865, announcement of General Order No. 3 by Union Army general Gordon Granger, proclaiming freedom for enslaved people in Texas, which was the last state of the Confederacy with institutional slavery.

 The Seneca Falls Convention
(July 19-20)
The Seneca Falls Convention was the first women's rights convention. It advertised itself as "a convention to discuss the social, civil, and religious condition and rights of woman". Held in the Wesleyan Chapel of the town of Seneca Falls, New York, it spanned two days over July 19–20, 1848. Attracting widespread attention, it was soon followed by other women's rights conventions, including the Rochester Women's Rights Convention in Rochester, New York, two weeks later. In 1850 the first in a series of annual National Women's Rights Conventions met in Worcester, Massachusetts.

Anniversary of Women Winning the Vote
(August 26th)
On August 26, 1920, after three generations of an unrelenting, brilliant, courageous, political campaign, women in the United States won the right to vote.  
To honor and commemorate this historic event, Bella Abzug introduced a Congressional Resolution to ensure that this date would be commemorated with the designation of Women's Equality Day, which is celebrated on August 26th each year. 

Anniversary of the Signing of the Constitution
National Constitution Day September 17th
On September 17, 1787, the delegates to the Constitutional Convention met for the last time to sign the document they had created.