Two pence (British decimal coin) dots, a common feature on coins, known as beading. As with all new decimal currency, until 1984 the portrait of Queen Elizabeth II by Arnold Machin appeared on the obverse, in which the Queen wears the 'Girls of Great Britain and Ireland' Tiara. Between 1985 and 1997 the portrait by Raphael Maklouf was used, in which the Queen wears the George IV State Diadem. In 1992 the metal used in minting this coin was switched from bronze to copper-plated steel. From 1998 to 2015 the portrait by Ian Rank-Broadley was used, again featuring the tiara, with a signature-mark below the
Decimal time He also suggested a week of 10 days and dividing the year into 10 "solar months". Decimal time was officially introduced during the French Revolution. Jean-Charles de Borda made a proposal for decimal time on November 5, 1792. The National Convention issued a decree on 5 October 1793: These parts were named on 24 November 1793 (4 Frimaire of the Year II). The primary divisions were called hours, and they added: Thus, midnight was called either "dix heures" (10 o'clock) or "zero heures" (0 o'clock), noon was called "cinq heures" (5 o'clock), etc. Units were either written out or abbreviated,