Purim is a Jewish holiday that is celebrated annually on the 14th of the Hebrew month of Adar (usually in late February or early March). The holiday commemorates the salvation of the Jewish people in ancient Persia from a plot to destroy them. The story is told in the biblical book of Esther, which is read in synagogues on the holiday.

According to the story, King Ahasuerus of Persia chose Esther, a Jewish woman, to be his queen. Esther's uncle Mordechai uncovered a plot by Haman, the king's advisor, to exterminate all of the Jews in the kingdom. Esther, with the help of Mordechai, was able to reveal Haman's plan to the king and turn the tables on Haman, resulting in the salvation of the Jewish people.

On Purim, Jews traditionally listen to the reading of the biblical book of Esther, which is also known as the Megillah. They also give gifts of food to friends and family, donate to charity, and participate in festive meals. One of the most recognizable customs of the holiday is the wearing of costumes and masks, often depicting characters from the story of Esther.

The holiday is also marked by the giving of gifts of food, known as mishloach manot, to friends and family, and by giving charity to those in need. Additionally, Jews are encouraged to drink alcohol, and many Purim celebrations involve drinking and feasting.

Overall, Purim is a joyous holiday that celebrates the survival of the Jewish people in the face of adversity. It is a time to come together as a community, give to those in need, and celebrate with feasting and revelry.