Tanya told everyone that she is getting married on 4th Saturday of month ‘x’. On which day is she getting married if the first day of the month is Wednesday ?

11st 12nd 18th 20th

18th

1st day of month :  Wednesday 4th day of month :  Sunday Similarly, 11th, 18th of the month are also Saturdays. Therefore third Sat will be one 18th .