The transit of Guru (Guru peyarchi in Tamil), from one rasi to another is considered as an important astrological event. It beliefs that  the influence of the transit on your rasi have a significant impact on your life. In Tamil astrology, Guru is one of the most powerful planets.

When is Guru Peyarchi in 2016?
The transit of Guru (Guru peyarchi) in 2016 occurs from Simmam Rasi to Kanni Rasi. The date of the transit as per the two popular Panchangam systems is follow respectively. According to Vakya Panchangam: on 18th of the month of Aadi of Durmukhi Tamil year (2nd August 2016). According to Thirukkanitha Panchangam: on 27th of the month of Aadi of Manmatha Tamil year (11th August 2016).

Every year thousands of devotees visit to the Thittai Sri Vasishteshwarar temple. Also this time officials are expecting thousands of pilgrims will visit Thittai Sri Vasishteshwarar temple. All arrangements will be made to ensure that pilgrims who visit Thittai Sri Vasishteshwarar temple on the occasion of Guru Peyarchi (celestial transit of Planet Jupiter) slated for Tuesday when thousands of devotees are expected to gather at the temple, according to Collector A. Annadurai. Police and law-enforcement agencies established monitoring cameras to reinforce safety of the public.

Mr. Annadurai has reviewed the preparations at the shrine here on Sunday and spoke to the officials as well as instructed the TANGEDCO officials to ensure seamless power supply during the festive period in Thittai and surrounding areas, besides asking the administration officials to keep ready auxiliary power sources to emergency situations. He told the Department of Public Health personnel to keep ready advanced critical care ambulance, besides establishing first aid centres and posting enough medical and paramedical professionals. source