Should one visit graves on Rosh Hashanah?
Answer:
No, one should not visit graves on Rosh Hashanah, which is a Yom Tov (a joyous time – Hashem is close to us in His judgment).
However, the Rema (581) writes that some have the custom of visiting graves on the eve of Rosh Hashanah, in order to beseech Hashem for a good year in the merit of the righteous who are buried there, and in order to be awakened to repent.
Best wishes.