Champaka Chaturdashi or Champak Chaturdasi Vrat is observed on Jyeshta Shukla Chaturdashi, fourteenth day in bright half of Jyeshta maas. In 2015, Champak Chaturdasi Vrata date is June 1.
As per ‘Amadher Jyotishi’ Jyeshta Shukla Chaturdasi is referred to as Champak Chaturdasi.
‘Chaturvarga Chintamani’ describes that on Jyeshta Shukla Chaturdashi day, ‘Vayu Vratam’ (Vrat dedicated to Vayudeva) is performed and according to ‘Smruthi Kaushubham’ Rudra Vratam (Shiva Puja) is observed.
In 2014, Champak Chaturdasi Vrata date was June 12.