Jeth/Jayth is a third month in the Sikh Calendar, the Nanakshahi calendar. This month coincides with May/June of the Western/Georgian/Julian Calendar and is the month after the harvest festival in Punjab. This year the first day of this month falls on the 15 May. The month is 31 days long; it starts on May 15 and ends on June 14. On June 15, begins the fourth month in the Sikh Calendar called Harh. During Jeth, in Punjab, the land of the Sikh Gurus, the season is the beginning of summer and the climate is beginning to get very hot. Most tourists will leave this area towards the end of the month as it starts becoming oppressively hot. The months of Jeth, Harh and Sawan are the hottest of the year in this region.

Guru Amar Das Ji was born this month on the 23 May (9 Jeth) and on the 11 June (28 Jeth) Guru Hargobind Ji became the sixth Sikh Guru.