Henley Royal Regatta: the village of Henley-on-Thames, on the River Thames in Oxfordshire, stages its first regatta.

Henley Royal Regatta is a rowing event held annually on the River Thames by the town of Henley-on-Thames, England. It was established on 26 March 1839. It differs from the three other regattas rowed over approximately the same course, Henley Women's Regatta, Henley Masters Regatta, and Henley Town and Visitors' Regatta, each of which is an entirely separate event.

Henley-on-Thames is a town and civil parish on the River Thames, in the South Oxfordshire district, in Oxfordshire, England, 9 miles (14 km) northeast of Reading, 7 miles (11 km) west of Maidenhead, 23 miles (37 km) southeast of Oxford and 37 miles (60 km) west of London, near the tripoint of Oxfordshire, Berkshire and Buckinghamshire. The population at the 2021 census was 12,186.

The River Thames, known alternatively in parts as the River Isis, is a river that flows through southern England including London. At 215 miles (346 km), it is the longest river entirely in England and the second-longest in the United Kingdom, after the River Severn.

Oxfordshire is a ceremonial county in South East England. The county is bordered by Northamptonshire and Warwickshire to the north, Buckinghamshire to the east, Berkshire to the south, and Wiltshire and Gloucestershire to the west. The city of Oxford is the largest settlement and county town.

Boat racing is a sport in which boats, or other types of watercraft, race on water. Boat racing powered by oars is recorded as having occurred in ancient Egypt, and it is likely that people have engaged in races involving boats and other water-borne craft for as long as such watercraft have existed.