We say:  “When Adar enters happiness increases.”
Purim is celebrated on the 14th of Adar except in Jerusalem where it is celebrated on the 15th Adar.  The Jews of Shushan—a walled city—fought their enemies for an extra day.
Persia is modern-day Iran.
In Deuteronomy 25:19, we are commanded: “You shall blot out the remembrance of Amalek from under heaven; you shall never forget.”  Amalek is the historic enemy of the Jews, and Haman is a descendant of Amalek.  As we listen to the reading of the Megillah, whenever Haman’s name is mentioned we blot it out with groggers, foot stomping, and shouting.
Haman’s name is mentioned 54 times in the Megillah.
Haman had 10 sons; when their names are read from the Megillah, it is a tradition to read them quickly without taking a breath.
The longest verse in the Bible is found in one verse of the Book of Esther (8:9) — it has 43 words in Hebrew and 90 words in English.
All the letters of the Hebrew alphabet are found in one verse in Esther (3:13).
There is a street in Tel Aviv called Queen Esther Street
The Jewish women’s organization Hadassah was founded on Purim.  Hadassah was Esther’s Hebrew name.

Chag Purim Sameach ~ Rabbi Teri