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
Decimal Day the 1s, 2s and 10s coins, were called in during the initial process between 1969 and 1972; the ten shilling coin, which, as recently issued and in any event equivalent to 50p, was permitted to remain outstanding (though due to silver content, the coin did not circulate). The 1s and 2s were recalled in 1993 and 1994 respectively. Pre-decimal Irish coins may still be redeemed at their face value equivalent in euro at the Central Bank in Dublin. Pre-decimal Irish coins and stamps' values were denoted with Irish language abbreviations ("scilling" ("shilling", abbreviated ""s"") and "pingin" ("penny", abbreviated ""p"")) rather