Decimal Day use pennies or threepenny pieces, to pay them in multiples of 6d (p, the lowest common multiple of the two systems). Bus companies (at that time many state-owned by the National Bus Company) were another exception, going decimal on Sunday 21 February. Decimal Day itself went smoothly. Criticisms included the small size of the new halfpenny coin and the fact that some traders had taken advantage of the transition to raise prices. Some used new pennies as sixpences in vending machines. After 15 February, shops continued to accept payment in old coins, but always issued change in new coins. The
Coins of the Republic of Ireland coins used the Irish red deer design from the Irish pound coin with a mountain relief in the background and other notable differences such as the 12 stars of the European Flag surrounding the harp, quite similar to the Irish euro coins. The coins issued under the Decimal Currency Acts were finally withdrawn from circulation in 2002 by the Irish Pound Coinage (Calling In) (No. 2) Order, 2001 which revoked an earlier similar order; the date was set for 10 February 2002. The introduction of the euro was overseen by the "Euro Changeover Board of Ireland" which was a special