The style guide for the UK's Qatar Goodwood Festival -- a five-day horse-racing event better-known as "Glorious Goodwood" -- doesn't mention anything about mandatory hats.
원문출처 : https://www.cnn.com/style/article/goodwood-qatar-ladies-day-hats/index.html
원문출처 : https://www.cnn.com/style/article/goodwood-qatar-ladies-day-hats/index.html