Twin birthdays refer to the phenomenon when twins are born on the same day, sharing the same birth date. This can occur when both twins are delivered during the same labor, whether they are identical or fraternal. In some cases, twins may be born on different days if one is born just before midnight and the other just after. Celebrating twin birthdays can be a unique experience, as families often choose to have joint birthday parties. This allows for shared celebrations, with themes and activities that cater to both twins' interests. Many families enjoy the special bond that comes with having twins, making their birthdays a memorable occasion.