Q. How can one thank the building super and a Christmas card like all other tenants do?

A. On a similar question (2083) we answered:

“On question 963 regarding if it is proper to give New Year bonuses to employees right before the New Year or should a company wait until after or give them out weeks before the New Year. Also if one can we include a New Year’s wishing-well card, we wrote:

‘Horav Shlomo Miller’s Shlit”a opinion is that unlike Christmas, New Year is not considered today a religious celebration and therefore you may give out the bonuses right before that day while also accompanied with a New Years greeting card.

See also question 695 regarding answering to a greeting of “Happy New Year” that the Rov maintains that it is permitted since in our days there is no religious connotation to the greeting. In addition, you may initiate the salute if it generates a Kidush Hashem by displaying good manners.”

Rabbi A. Bartfeld as revised by Horav Dovid Pam, Horav Aharon Miller and Horav Chanoch Ehrentreu Shlit’a