Chandani Padva or Chandi Padvo is an occasion when Surtis (Gujarati people from Surat) enjoy a popular local variety of sweet Ghari, Bhushu (namkin), Liquor(daru). The festival falls on a day after Sharad Poornima, the last full moon day in the Hindu calendar.
References
Chandani Padva Wikipedia(Text) CC BY-SA