When you think of the world's great religions, Zoroastrianism will not likely come to mind. One of the world's most ancient religions, it used to have millions of followers. Today that number has shrunk to around 200,000 people, mostly in India and Iran. Still, its followers around the world gather six times a year to celebrate Gahambar, a religious festival to honor the fruits of the seasons. Recently, believers gathered in the hills of San Jose at one of the state?s only Zoroastrian temples to pray, eat and keep their faith alive in the West.