Yalda Night is one of the great celebrations of ancient Persia that is still celebrated. This night refers at sunset in Persian calendar (date) on Azar 30th, last day of autumn (21st of December) until sunrise on Dey 1st, first day of winter (22nd of December). Iranians and many other nations celebrate it. This night is also very important from a scientific point. Because it is the longest night of the year in the northern hemisphere of the earth.
27th June (6th Tir in Persian calendar) was Celebration of lotus in Ancient Iran (Persia). Lotus flowers had special significance in Ancient Iran and they represent purity because even though they grow from the mud they are clean.
Lotus also can be a symbol of perfection because the day of Lotus celebration is in Khordad day (The name of all 6th days of months in Persian calendar is Khordad) and Khordad means perfection.
In Persian culture, Ladies have great place. In ancient Persia there was special day for women. In this day men gave gifts to women. “Espandegan” was the name of this day and also this day known as a celebration in Persia(Iran).
About This celebration, Biruni (Persian scholar) writes:
On the 5th day or Espandarmath-Roz (day of Espand), there is a feast on account of the identity of the names of the month and the day. Espandarmath is charged with the care of the earth and with that the good, chaste, and beneficient wife who loves her husband. In the past times, this was a special feast of the women, when the men used to make them liberal presents. This custom is still flourishing in Ispahan, Ray, and in other districts of Fahla. In Persian it is called Mozdgiran[Mojdgiran])