Awww cmon!
on erev shabbos its a mitzvah to get a haircut,
when erev shabbos falls out on rosh chodesh R yehuda Hachassid says shouldnt get a haircut (some hold of it some say its a chumra) and when Rosh Chodesh falls out on erev shabbos during sfira then r moshe says even those that hold like R yehuda hachassid say its muttar