Noe-rooz : (Persian for “the new day”) represents the arrival of the New Year in Iranian calendar (also referred to as “the Persian New Year), and is the most cherished national festival in Iran. It marks the first day of spring, and begins at the exact time of the vernal equinox in the Northern Hemisphere in late March).
Noe-rooz is rooted in a Zoroastrian custom, and has been used to celebrate the arrival of spring at least since the Achaemenid era (5th century BC). Noe-rooz (or a close variation of it) is celebrated in many countries in south, south central, and southwest Asia, including Iran, Iraq, Afghanistan, Tajikistan, Uzbekistan, Azerbaijan, Turkmenistan, Kazakhstan, and Kyrgyzstan. In 2010, the UN General Assembly recognized the International Day of Noe-rooz, describing it as a spring festival of Persian origin which has been celebrated for over 3,000 years.
Yalda : is the Persian winter solstice celebration with an ancient historical background. Yalda Night is the longest night of the year in the Northern Hemisphere, and marks the beginning of winter.
It is usually celebrated on December 20 or 21 each year. Yalda has its roots in Mithraism, but it has become a social occasion when family and close friends get together and have obligatory servings of fresh fruits, especially watermelon and pomegranate.
Chahar-Shanbeh-Soori : (Persian for Wednesday Feast) is an ancient Iranian festival that dates back to at least 1700 BC of the early Zoroastrian era. Also called the Festival of Fire, it is a prelude to Noe-rooz, and is celebrated on the eve of the last Wednesday of the Iranian year.
The celebration usually starts in the evening, with people making bonfires in the streets and jumping over fire singing “my sickly yellow paleness be yours; your fiery red color be mine”. This means they want the fire to take away their sickness and problems, and in turn give them redness and energy.
Ashura : For Shi’a Muslims, Ashura marks the climax of the Remembrance of Muharram, and commemorates the death of Husayn ibn Ali, the grandson of Muhammad at the Battle of Karbala on 10 Muharram in the year 61 AH ( in AHt: October 10, 680 CE).