She won nine of her 23 starts, including the Group 1 Nassau Stakes three times (unequalled), the Yorkshire Oaks, Prix Vermeille and the Breeders' Cup Filly and Mare Turf.

She ran finished second in the 2009 Epsom Oaks and in the Breeders' Cup Filly and Mare Turf in 2010.

She was trained throughout her racing career by Henry Cecil at his Warren Place stable in Newmarket, Suffolk She was sired by the top-class 2-year-old and sprinter Oasis Dream and is out of the Kingmambo mare Midsummer.

Midday ran four times as a juvenile in 2008, recording her only success in a maiden race over one mile at Newmarket Racecourse on 19 September.

[2] In autumn she ran third in the Prix Vermeille before being shipped to California, where she won the Breeders' Cup Filly & Mare Turf.