The British farthing (from Old English fēorðing, from fēorða, a fourth) abbreviated qua. (L. quadrans), was a denomination of sterling coinage worth 1/960 of one pound, 1/48 of one shilling, or 1/4 of one penny; initially minted in copper and then in bronze, which replaced the earlier English farthings. Before Decimal Day in 1971, Britain used the Carolingian monetary system, wherein the largest unit was a pound sterling of 20 shillings, each of 12 pence. Each penny was divided into 4 farthings, thus, a pound sterling contained 960 farthings, and a shilling contained 48 farthings. From 1860 to 1971, the purchasing power of a farthing ranged between 12p and 0.2p in 2017 values.