How do Sikh people celebrate Gurpubs?

Guruprabs are celebrated by continuous reading of Guru Granth Sahib which takes 48 hours.During this process Sikhs visit to Gurudwara continuously, they help in cooking community meal (langar) which goes from the beginning of the Guruprabs till the end.Singing of Hymns takes place, reflecting upon the teachings of Sikh Gurus and Sikh Bhagats.