[stylin19a]

From the Capitol Police:

House Galleries: When the House is in session, the Galleries will be open to Members of Congress who personally escort guests to the Galleries. The Galleries will open 30 minutes prior to the beginning of the session. The House Galleries are closed when the House is out of session and during all Pro Forma sessions.

Senate Galleries: Two Senate Galleries are now open to the public. They will open 30 minutes prior to the session and will remain open until adjournment each day. If the Senate is in session past 4 p.m., one U.S. Capitol Police security screening area will be open in the Capitol Visitor Center’s north screening area to accommodate Gallery access. When the Senate is not in session, the two Senate Galleries will be open from 8:30 a.m. to 4:00 p.m., Monday – Friday, with the exception of Federal holidays.

Gallery passes are required to enter the Senate galleries and may be obtained through your Senator’s office by visiting the Senate Appointment Desk after entering the building through security screening.

[stylin19a]

I don’t know what it was jan 6 2021.
Probably changed by now