A harvest festival, Vaisakhi is observed in several parts of North India, especially in Punjab, on April 13 or 14 every year to celebrate a good agricultural year and pray for abundant crop produce for the next season.
Though Vaisakhi is celebrated with vigour in many North Indian states (Punjab, Himachal Pradesh and Uttarakhand), it holds special significance for Punjabis and Sikhs, primarily for four reasons. First, it marks the beginning of their solar year and the harvest of rabi crops. Since Punjab is primarily an agrarian state, this day holds greater importance as farmers thank their gods for good harvest and hope for another good year.
Second, it was on this day in 1699 that Guru Gobind Singh, the 10th Sikh guru, founded the Khalsa Panth and famously evoked nationalism and unity among his people at a meeting in Anandpur Sahib.
He is also believed to have converted his first batch of five disciples (the Panj Piaras) into Singhs by administering nectar to them, and thus inducting them into the martial community.
Also, this day in 1699 marked the end of the long tradition of gurus in Sikhism and established the Guru Granth Sahib as the eternal guide for the community.