SELECT *, DATEDIFF(CONCAT(dateYear, '-', dateMonth, '-', dateDay), CURDATE()) AS the_diff FROM event WHERE dateDay = '20' AND dateMonth = '3' AND dateYear = '2024' AND IF(institution2 IS NOT NULL AND institution2 <> '', institution2 LIKE '%united%states%holocaust%memorial%museum%', institution1 LIKE '%united%states%holocaust%memorial%museum%')