Decimal Day in the United Kingdom and in Ireland was Monday 15 February 1971, the day on which each country decimalised its respective £sd currency of pounds, shillings, and pence.
An introductory pack of the new currency.
British decimalisation training stamps in the same colours and values as the upcoming decimal stamps
A "Decimal Adder"
Cash register in Ireland; the keys have values in "new pence" above and pre-decimal equivalents below.
£sd, spoken as "pounds, shillings and pence", is the popular name for the pre-decimal currencies once common throughout Europe. The abbreviation originates from the Latin currency denominations librae, solidi, and denarii. In the United Kingdom, these were referred to as pounds, shillings, and pence.
A sampler in the Guildhall Museum of Rochester illustrates the conversion between pence and shillings and shillings and pounds.
Old till in Ireland, with "shortcut" keys in various £sd denominations (lower numbers) and their "new pence" equivalent (upper numbers)
Toy coin, which teaches children the value of a shilling
Carolingian denarius