Fox News’ Bill O’Reilly admitted Thursday evening that he was wrong to have said that no Republicans had been invited to speak at the March on Washington’s 50th anniversary ceremony. They were, he admitted — they just had better things to do.

Then O’Reilly — with no apparent irony — offered a “Tip of the Day” to his viewers: “Always check out the facts before you make a definitive statement..”

He then apologized because, “I know you watch The Factor for accuracy.”

During a debate last year, The Daily Show‘s Jon Stewart called O’Reilly “The Mayor of BS Mountain.”

This clip is slightly not safe for work because of the language.