William Day (bishop)

William Day (1529 – 20 September 1596) was an English clergyman, Provost of Eton College for many years, and at the end of his life Bishop of Winchester.

He was born the son of Richard Day of Shropshire and educated at Eton College and King's College, Cambridge, where he was Fellow in 1548, and graduated MA, in 1553. He became Provost of Eton College in 1561, his predecessor Richard Bruerne being ejected; it was a position he held until 1595.

He was created Archdeacon of Nottingham in 1561 and canon of St George's Chapel, Windsor in 1563, before being appointed Dean of the Chapel Royal and Dean of Windsor in 1572. He was registrar of the Order of the Garter, from 1584, and chancellor of St Paul's Cathedral, from 1587. He was raised to the episcopy as Bishop of Winchester in 1595.

He died in 1596.

George Day, Bishop of Chichester, was his brother. He married Elizabeth Barlow, daughter of William Barlow. Francis Day of Madras was possibly a grandson, son of his son William Day of Bray.