The decimalisation process in the United Kingdom and Ireland culminated on February 15, 1971, known as Decimal Day, when both nations officially adopted a decimal currency system. Prior to this, the UK used a complex system that included 240 pence in a pound, comprised of 12 pence to a shilling and 20 shillings to a pound. The decision to switch to a decimal system stemmed from a need for modernization and simplification of currency for users. The policy was supported by extensive public information campaigns to prepare citizens for the changeover. The Financial Secretary to the Treasury, John Nott, played a significant role in overseeing this transition, and numerous public institutions worked to educate citizens on the new currencies. Banknotes and coins were redesigned, displaying clear decimal indications to facilitate easy recognition of values.The new currency system consisted of new coins including 1 pence, 2 pence, 5 pence, 10 pence, 20 pence, and 50 pence coins, as well as £1 and £2 notes. One of the most interesting aspects of the transition was the introduction of a new 50 pence coin, which had a distinct shape and size. The introduction of decimal coins resulted in a major change in public transactions, requiring adjustments in commerce, accounting, and everyday life for the populace. Businesses also had to update their cash registers and financial systems in response to the new monetary format. The transition faced initial resistance, yet over time public acceptance grew as the benefits of a simpler system became evident.