I've seen other questions/answers here in regard to the U.S. Congress for information like what bills a particular congress person voted on, sponsored, or speeches and such. However, I am looking to see on a given day if Congress was in session or at recess.
I have found this from the senate's webpage: https://www.congress.gov/days-in-session
However this does not seem to be an easily consumable calendar format, and it only goes back to 1995.
I also found this: https://www.govtrack.us/data/us/sessions.tsv
Which is somewhat useful however there is a difference between a session which generally lasts the entire year, and which days Congress was doing business or in recess.