I had six so far 🙂:
New Years, Good Friday, Easter Monday, Labour Day, Ascension Day, Pentecost.
There are only 4+ ²/₂ official holidays left in the rest of the year though:
German unity day, Reformation day, 2 Christmas Days. Christmas Eve and New Year's Eve are ½ a holiday each.
What would you sue for? Just move to West Virginia with your sister and be happy. Maybe you could sue 23andme to pay for the moving truck.