Strawman Yiddishkeit
This past Friday, Erev Shabbos, was also Rosh Chodesh Iyar. The Mishnah B’rurah (493:5) states clearly that even for those who practice the mourning customs of S’firah starting from the beginning of S’firah (second day of Pesach), they may nonetheless get haircuts and even get married on that day due to the confluence of Rosh Chodesh and the oncoming Shabbos.
