‘Jamai' means son-in-law and 'Shasti' is the sixth day in a fortnight in a traditional Hindu calendar. So, ‘Jamai Shasti’   is dedicated to the son-in-law and is observed on the sixth day during the Shukla Paksha meaning waxing phase of moon in the month of ‘Jaishto’ which corresponds to May –June. The occasion is observed mainly in Bengal. Sons-in-law are invited and honoured on the day by the in-laws. Mother-in-laws cook special dishes for their sons-in-law on the day. So, it is a special day for the ‘Jamais’.