110 years to this week in December 1911 when the last of three Delhi Durbars took place and King George V and Queen Mary were crowned Emperor and Empress of India. While the coronation took place on December 12, the king in the Imperial State crown and Queen Mary in the tiara we now refer to as the Delhi Durbar as it was assembled from several other pieces specifically for this event, the celebration lasted a week. The third photo below shows the new Emperor and Empress at another parade, both in hats.
Embed from Getty Images
Embed from Getty Images
Images from Getty and social media as indicated
Royal Hats 
All the hats are magnificent. While the winter season, I would love to know the temperatures. I am also impressed with the Empress’s beautiful parasol.