IF DATEPART(dw, GETDATE()) = 1-- any time on Sunday
    OR ( DATEPART(dw, GETDATE()) = 7
         AND DATEPART(hour, GETDATE()) > 5
       ) -- after 6 a.m. Saturday
    OR ( DATEPART(dw, GETDATE()) = 2
         AND DATEPART(hour, GETDATE()) < 6
       ) --before 6 a.m. Monday
    BEGIN
        PRINT 'Criteria correct'
    END