If C1 is showing 2004, you can get Good Friday for this year with the following formula from Chip Pearson:
=(FLOOR(DAY(MINUTE($C$1/38)/2+56)&"/5/"&$C$1,7)-34)-2
Once you know the date for Good Friday, simply add a number to get the date that you want (that depends on how you define “after Easter” – does that mean the Tuesday after Easter Monday?)
Regards,
Mike