President Biden will give the 2023 State of the Union Address to a Joint Session of Congress, 9pm EST/6pm PST.
Media coverage often begins prior to the start of the SOTU address, so check whichever media source you use for that info.
Available at C-SPAN : https://www.c-span.org/video/?525522-1/2023-state-union-address-republican-response
and multiple other media outlets on TV and online.
Here is the White House’s official info including livestream: https://www.whitehouse.gov/state-of-the-union-2023/
Note: both CSPAN and the White House website have options for a reminder email to be sent to you before the event.
Click Here for Information about the history of the State of the Union Address