You’re way behind. Latin plurals are right out, and have been for years. Well, Webster’s Seventh, Ninth, and Eleventh Collegiate Dictionaries ( 1963, 1984, 2003 ) all list “millennia or millenniums,” but the various style manuals have all gone for english pluralizations, I believe.
Yeah, if you're not winning give up.
It was all over when Star Trek N.G. featured a (single) character named Data. But if datum is awkward, datas is even more so.
Thanks dr_lew. Obviously they’ve never seen “Life of Brian”. ;’)
Milleniums just sounds uneducated. I prefer to stick with the Latin plurals for Latin words.