Latin date conversion

Dies Dominica XXXI Maius MMIX

from http://www.guernsey.net/~sgibbs/roman.html

thanks buddy! I have seen many variations of this date even PRIDIE KALENDIS IVNIAS MMVIIII

hopefully George, our resident expert, can confirm it...

Don't forget A.D. Anno Domini

or better yet, none of this Giovanni-come-lately AD stuff. We want all out-Latin here, so as Julius Caesar would probably say, it should be
Dominica XXXI Maius MMDCCLXII A.U.C. (Ab Urbe Condita, "From the founding of the city" [i.e. Rome])

MORE NOSTRO
DOMENICA DIES TRICESIMUS PRIMUS MENSIS MAII ANNI AB INCARNATIONE DOMINI BISMILLESIMI NONI = dies XXXI mensis maii anni MMIX
*
MORE ROMANO
DIES SOLIS PRIDIE CALENDAS IUNIAS ANNI AB URBE CONDITA BISMILLESIMI SEPTINGENTESIMI SEXAGESIMI SECUNDI = prid. Cal. Iun. anni a.u.c. MMDCCLXII