9 Adar - Yahrzeit of Reb Yehudah HaChasid ZY"A & Reb Shlomo Zalman of Volozhin ZY"A

Reb Yehudah HaChasid ben Reb Shmuel Hachasid ZY"A, famous for the Sefer Chasidim and his Tzavah, which includes many things that people are careful about, such as having wife and mother with the same name, sealing up windows, moving stoves, cutting hair and nails on Rosh Chodesh and many others. There is sakana involved with these. (Note:there are ways, brought down by tzadikim ,to do some of these. If relevant speak to a competent Rov who is familiar with this.)

Reb Shlomo Zalman, brother of Reb Chaim of Volozhin. He passed away in his thirties- was already an exceptional Gaon at that time