Big Day in US History
Today in 1789, the 1st Congress was seated.
That was made possible by the taking of Dorcester Heights on this date in 1776 which drove the British out of Boston which they had occupied for a while trying to repress the brewing rebellion.
In addition, other than Washington's first inauguration and Presidents sworn in following the death of their predecessor, every President up to and including FDR was sworn in on this date.
And on a lighter note, Ronald and Nancy Reagan married on this date in 1951.