Guru Nanak was born in April of 1469 in north-west India, (what is now Pakistan.) He would go on to become the founder of Sikhism as the first of the Ten Gurus of Sikhism. Although his birthday was in April, it is celebrated in November on the day of the full moon. (As such, the date will vary from year to year on the solar calendar, like other lunar based holidays.)
Most Canadians of Indian heritage who live in Canada are Sikhs, including many students at Lord Tweedsmuir, and communities throughout Surrey and Greater Vancouver.
For more on Guru Nanak and Sikhism, check out the SikhWiki, the online “Encyclomedia of the Sikhs.”