What would this birthday in roman numerals be?

I'm getting the word cherish, with my moms birthday in roman numerals tattood right under it. I'm so confused about the roman numerals birthdate though. I've seen many diferent websites and they all say something diferent about how a birthday written uses different numbers or something haha. Her birthday is 7 23 1965. ( July). I. And I alsocant decide if I want to get the entire 1965, or just 65. What's your opinion? And what's your opinion on the tattoo? Does it spuds like a good meaningful tattoo?