Inter-calary Month in June-July

Inter-calary Month in June-July
The lunar year Pramadi has an Adhika or Mala Masa (16-5-1999 to 13-6-1999) and a Suddha or Nija Masa (13-6-1999 to 13-7-1999) in the lunar month of Jyeshta. The Adhika and Mala Masas testify to the highly scientific method of calendar-making in ancient India.
The scientific Hindu Calendar, formulated by ancient Indians, is based on the natural movements of the luminaries. They called the year varsha, meaning 'shower of rains' or time during which the annual seasons completed their course, taking into account the movements of the sun. The night, on which the Masa or month becomes Poorna or complete, based on the movements of the Moon, was called Pournamasi (Pournima). They were perhaps the first to try, as pioneers in calendar - making right from the vedic times, to fuse, rather successfully, the solar calendar into the lunar and form a luni-solar calendar.