How should one write the day for Rosh Chodesh Adar Sheni this year in a ketubah. It’s “bsheni bshabat,” and then what?
Write: b’sheini b’shabbat, yom rishon (or א) lechodesh adar sheini, shenas chameishes alafim usheva me’os veshivim ve’echad.
For gittin, ketubos, and other documents, Adar by itself formally refers to the second Adar. However, it is the universal custom to write Adar Rishon and Adar Sheini, and this custom must be followed.