Young started a journey that would take the Mormon pioneers to Winter Quarters, Nebraska, in 1846, then to the Salt Lake Valley. Young arrived in the Salt Lake Valley on July 24, 1847, a date now known as Pioneer Day in Utah, which is also one of its holidays. The Mormon pioneers' journey was one of the largest and one of the best organized migration to the West. On August 22, 29 days after arriving in the Salt Lake Valley, Young started the Mormon Tabernacle Choir.