Mid-Shaban, the fifteenth day of the eighth month of the lunar calendar,marks the joyous occasion.
Imam Mahdi, known as the Savior or Messiah, was born almost 1,200 years ago.
Every year, millions of Muslims around the world hold festivities to honor the event.
In Iran, people decorate and light up streets and gather inside mosques and other religious sites nationwideto celebrate the auspicious occasion.
In Shia eschatology, Imam Mahdi is the prophesied redeemer, who will revive peace, administerjustice and rid the world of evil.
The occasion which falls on June 3rdthis year, is a national holiday in Iran.
By Press TV
