A Hebrew birthday is the date on which a person is born according to the Hebrew calendar. It is important for Jews, particularly when calculating the correct date for day of birth, day of death, a bar mitzva or a bat mitzva. The Jewish calendar differs from the secular and Christian Gregorian calendar as well as from the Islamic calendar, so the two birthdays do not coincide in most years. To determine the civil date for celebrating a Jewish birthday, one must first determine the date within the Jewish calendar and then determine the corresponding day in the civil calendar. Jewish days start and end in the evening, so a person born after dusk will have the following days date as their birthday.

A Jewish birthday has dual significance: according to Jewish tradition, a persons mazal (good fortune) is dominant on their birthday, and as a nation, Jews celebrate those dates when special events that affected their destiny occurred. As individuals, Jews celebrate those dates that have personal significance, and what is more significant than ones birth? . It is when the Creator said, "Here, I am giving you a body, a soul, and a divine mission. I have absolute trust in your ability to pull through for Me".

When the Hebrew calendar comes back around to a persons Hebrew birthday, there are some customs that can be followed. For example, one can find an enclave in time and space to think about the past year, take their life to a new level with a new mitzvah, or give some extra charity.

To find out ones Hebrew birthday, one can use a Hebrew Birthday Calculator.