When is it open to the public and what time if it does close?

See the Washington National Cathedral website

Everyday is open for the public but you have to pay... Sunday's are free!

M-f 10-5; sat 10-4. Sunday's are weird-you'd have to look online

Really worth the visit. Gorgeous building and the people are so very nice and informative

Check out the website. They asj fir a donation (entrance fee). It's well worth the visit.