need help with wording invites.

[cheeseandsproutssarnie]

when writting out invites-i need it to say thomas party.is it thomas' party or thomas's party?

Write how you speak - so Thomas's party.

ok thankyou.i just made lots of invitations and dh pointed out 'you are invited to thomas party' is wrong

i could but i didnt put ' or 's.so surely im wrong?im always right though(ofcourse)so i'll tell him im right and correct them when hes asleep!
thankyou people.