The Lubavitcher Rebbe’s secretary, Rabbi Nissan Mindel, during the 70’s would often find himself in the Rebbe’s office.
Once, he was in the office during the eve of the secular New Year. When twelve o’clock arrived, the Rebbe looked at his watch and said in English “Happy New Year.”
When Rabbi Mindel looked shocked at the Rebbe, the Rebbe responded: “It is an explicit verse (Tehillim 87:6): “The Lord counts in the script of the nations.”[1]
[1] Neirot LeHair, Pg. 23