It is one of the Rebbe’s directives to make a shehechiyanu on your birthday. Can it be done on new clothing or only on a new fruit?
Yes, it can.
Sources:
Sefer Hasichos 5748 vol. 2 pg 407
See also here:
To note, that perhaps there is an advantage in saying the shehecheyanu specifically during the birthday farbrengen – see Haoros Ubiurim #974 pg. 35 and #976 pg 88.
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