Answer
Once a Texas holiday
Step-by-step explanation:
Originated in Galveston Texas on June 19, 1865
African American Emancipation day
not all 50 states recognize this day before Biden
Biden signed the June tenth national independence day act
this day is known as the second independence day
Abraham Lincoln liberated the enslaved of people in Texas
declaration signed by General grainger to being the Emancipation proclamation into effect in Texas is seemed by many as the end of slavery
info on BBC website