December 26, 1861
George V is made the Prince of Wales at the age of 16, preparing him for his future role as the King of the United Kingdom, leading to significant responsibilities and shaping his path towards eventual monarchy.
Windsor, United Kingdom | British Monarchy
It appears there is a mix-up in the date you provided. George V was actually born on June 3, 1865, and therefore could not have been made Prince of Wales in 1861. The title of Prince of Wales has traditionally been granted to the heir apparent of the British throne, and George V himself never held this title. Instead, he was named Duke of York, and upon the death of his elder brother, Albert Victor, he became second in line to the throne. When his father, King Edward VII, died in 1910, George V became king.
If you have a particular event you would like information about, please provide the correct date, and I will be happy to offer a detailed account.
Source: www.royal.uk