Spring Equinox 2008
"March 21 and September 21 are known as the Spring Equinox and the Autumn Equinox respectively. They are singularly important days in the year since the Sun rises exactly opposite the East everywhere on Earth and sets exactly in the West. Also, everywhere on Earth experiences 12 hours of day and 12 hours of night, thus the equinoxes are days of perfect balance and harmony.
"The alignment of the Temple to the four directions means that its relationship with the Sun will be strengthened on these two days each year, with the Sunrise occurring directly through the East Gate, falling at the feet of Sri Sri Radha Madhava sanctum sanctorum."
[Source: The Indian Skyscraper Blog]