Yes, Daas Yochid, Chabad not only has extra yomim tovim but an extra rosh hashono. And it’s well known that when a certain rov complained to R Chaim Ozer that the chassidim are contradicting the mishneh which says there are only four roshei shonim, R Chaim Ozer replied ruefully: ביי זיי קומט צו און ביי אונז ווערט וויניגער. “They get more and we get less”.
