Decimal day occurred on 15 February 1971 when the UK decimalised its currency.

Under the old currency of Pounds, Shillings and Pence the Pound was made up of 240 Pence, with 12 Pence in a Shilling and 20 Shillings in a Pound. In an era before widespread computer use this meant that monetary calculation, such as adding up sums of money or calculating change was more complicated than with a decimal currency. 

The loss of value of the currency meant that the Penny was of relatively slight value, while the Farthing which was worth one-quarter of an old Penny had been demonetised on 1 January 1961.

Coins struck were the Pound, and 50, 20, 10, 5, 2, 1 and for a short while 1/2 Penny.  

Please see our Decimal 50p Coins for sale below:

50ps

Item	Date	Description	Grade	Additional Desc	Price
50p	2018	Paddington Palace & Station (2)	AUNC	in folder	£19.50	Buy
50p	2018	Paddington Station	UNC	in card	£9.50	Buy
50p	2018	Paddington Station	UNC/FDC		£7.50	Buy
50p	2018	People Act	UNC	in RM folder	£15.00	Buy
50p	2018	People Act	EF	poorly struck	£12.50	Buy
50p	2018	People Act	UNC	in card	£11.00	Buy
50p	2018	People Act	UNC/FDC		£7.50	Buy
50p	2018	Peter Rabbit	UNC	in RM folder	£15.00	Buy
50p	2018	Shield	UNC		£55.00	Buy
50p	2018	Snowman	UNC	in card	£19.50	Buy
50p	2018	Snowman	UNC		£17.50	Buy
50p Commemorative	2018	Stonehenge	UNC		£12.50	Buy
50p	2018	Tittlemouse	UNC	in RM folder	£19.50	Buy
50p	2018	Tittlemouse	UNC/FDC	in card	£12.50	Buy
50p	2018	Tittlemouse	UNC/FDC		£9.50	Buy
50p	2019	50 Years - British ...	UNC	in RM folder	£55.00	Buy
50p	2019	50 years 4 minute mile ...	UNC		£12.50	Buy
50p	2019	50 years Battle of ...	UNC	in card	£11.00	Buy
50p	2019	50 years Battle of ...	UNC		£12.50	Buy
50p	2019	50 years Dday slabbed ...	UNC		£12.50	Buy
50p	2019	50 years Girl Guides ...	UNC		£12.50	Buy
50p	2019	50 years Girlguides Slabbed ...	MS-66 DPL		£35.00	Buy
50p	2019	50 years Hastings	UNC	in card	£11.00	Buy
50p	2019	50 years Hastings slabbed ...	UNC		£12.50	Buy
50p	2019	50 years New Pence ...	UNC		£12.50	Buy
50p	2019	50 years New Pence ...	UNC		£19.50	Buy
50p	2019	50 years Scouting slabbed ...	UNC		£12.50	Buy
50p	2019	50 years Scouts Slabbed ...	MS-66 DPL		£32.50	Buy
50p	2019	50 years Soldier slabbed ...	UNC		£12.50	Buy
50p	2019	50 years VC	UNC	in card	£11.00	Buy
50p	2019	50 years VC slabbed ...	UNC		£12.50	Buy
50p Commemorative	2019	Apollo II	UNC		£12.50	Buy
50p Commemorative	2019	Brexit - We're ...	UNC		£12.50	Buy
50p	2019	British Culture Set (5)	UNC	in RM folder	£110.00	Buy
50p Commemorative	2019	Castles - Belfast	UNC/FDC		£12.50	Buy
50p Commemorative	2019	Castles - Conwy	UNC/FDC		£12.50	Buy
50p Commemorative	2019	Castles - Edinburgh	UNC/FDC		£12.50	Buy
50p Commemorative	2019	Castles - Warwick	UNC/FDC		£12.50	Buy
50p Commemorative	2019	Castles - Windsor	UNC/FDC		£12.50	Buy
50p Commemorative	2019	Down Royal Racecourse	UNC		£12.50	Buy
50p	2019	Gruffalo	UNC	in RM folder	£15.00	Buy
50p	2019	Gruffalo	UNC		£12.50	Buy
50p	2019	Gruffalo and Mouse	UNC	in RM folder	£15.00	Buy
50p	2019	Gruffalo and Mouse	UNC		£12.50	Buy
50p	2019	Gruffalo Slabbed by ...	MS-65 DPL		£35.00	Buy
50p	2019	Hawking	UNC	in RM folder	£15.00	Buy
50p	2019	Hawking	UNC		£12.50	Buy
50p	2019	Holmes	UNC/FDC	in RM folder	£15.00	Buy
50p	2019	Kew Gardens	UNC		£85.00	Buy
50p Commemorative	2019	Murrayfield	UNC		£12.50	Buy
50p	2019	New pence	UNC	in card	£11.00	Buy
50p	2019	New Pence	UNC		£9.50	Buy
50p	2019	New Pence I ...	UNC	in RM card	£19.50	Buy
50p	2019	Paddington St. Pauls	UNC/FDC	in RM folder	£15.00	Buy
50p	2019	Paddington St. Pauls	UNC	in card	£11.00	Buy
50p	2019	Paddington St. Pauls	UNC/FDC		£9.50	Buy
50p	2019	Paddington Tower	UNC	in RM folder	£15.00	Buy
50p	2019	Paddington Tower	UNC/FDC		£9.50	Buy
50p	2019	Paddington Tower & St. ...	UNC/FDC	in folder	£25.00	Buy
50p	2019	Peter Rabbit	UNC	in RM folder	£17.50	Buy