Our Rabbi and the Hebrew Date

Our Rabbi, Ha-Rav Tzvi Yehudah Ha-Cohain Kook

"I received your letter with a date which I do not know or understand, since I am unfamiliar with the counting of time from the year of the birth of 'that sinner of Israel whom the non-Jews made into idol worship' [the words of my father, my teacher and my Rabbi, Ha-Rav Kook ztz"l in 'Igrot'], who practiced sorcery, enticed and led Israel astray (Sanhedrin 107), who caused Israel to be destroyed by the sword and its remnants scattered in humiliation, who exchanged the Torah and deceived the majority of the world to serve a god other than Hashem (Rambam, Hilchot Melachim chap. 11)." (Igrot Rabbenu from 24 Adar Rishon 5727)

Our Rabbi was particular that one should not write the Christian date, and when he was invited to a wedding and the Christian date appeared on the invitation, he would not attend the wedding. (Gadol Shimushah p. 91 #31)

A rabbi of a community outside of Israel visited our Rabbi, and during the conversation our Rabbi asked about the date of a particular event. The guest answered with the date according to their count. Our Rabbi said: "Excuse me, I did not hear." He raised his voice and repeated his words. Our Rabbi again said to him: "I did not hear," and again a third time. On the fourth time the guest understood what our Rabbi did not hear, and he told him the Hebrew date. Our Rabbi heard and smiled, and the guest apologized.

Our Rabbi agreed to participate in an important ceremony on behalf of the Municipality of Jerusalem, but when he saw that only the Christian date and not the Hebrew date, was on the announcement, he refused to attend, and all of the attempts at persuasion did not help.

When the ruling of Rav Ovadiah Yosef was publicized that there is no prohibition in using the Christian date and those who use it have what to rely on (Shut Yabia Omer vol. 3 Yoreh Deah #9), our Rabbi expressed deep pain. (see Le-Netivot Yisrael vol. 2 p. 239. From Shut Sheilat Shlomo 3:14)
He was amazed every time he saw a stamp on a letter in Israel which was marked with the date from the Creation of the World. (Gadol Shimushah pg. 93 #34)
A student once read a printed sentence "the seventeenth century" and added: "May they be blotted out," and it got good laugh from our Rabbi. (Iturei Coahnim #242 in the name of Ha-Rav Menachem Ha-Cohain)