Q. If you use the civil date, are they any preferences as to how you write the date?
Thanks again.

A. It is preferable to avoid numerals for the months (see prior answer) and use when possible the abbreviated names of the months, since these names may also contain pagan connotations (Piskei Teshuvos 156 n. 17).

Horav Shlomo Miller Shlit”a mentioned that Horav Yakov Kamentzki Zt”l would only use the last three ciphers of the year numeral. By the same token it would be better to use the more customary two digits for the year.

Rabbi A. Bartfeld as revised by Horav Shlomo Miller Shlit”a