If Shashtyabdhapoorthi (60th birthday ceremony) is not performed on the designated birth star (Janma Nakshatra), can it be celebrated in another month on the same birth star, or on a different day under a different star?

Generally, Shashtyabdhapoorthi is celebrated at the completion of the 60th year (Shashti Abda Poorthi). If any obstacles arise, people tend to do it in the subsequent month or the month after that under the same birth star. If the main intent is to perform Sashtiapthapoorthi and offer monetary respects (Sambhavana) to those who have studied the Vedas, doing it in a different month does not seem to be wrong.