Australia issued a 20-cent coin for the 100th anniversary of International Women's Day. The Royal Australian Mint released the commemorative coin in 2011, marking a centenary counted from the first International Women's Day observance in 1911.
The coin carries the inscriptions “INTERNATIONAL WOMEN'S DAY” and “1911 2011.” Its design includes three superimposed figures over the wording “CELEBRATING 100 YEARS,” with that phrase repeated around the coin. It was a circulating commemorative issue rather than a large-denomination collector medal.
The denomination is easy to confuse with Australia’s commemorative 50-cent and dollar coins, which are also frequently used for national anniversaries. The 20-cent piece is part of Australia’s regular decimal coinage and normally features a platypus on its reverse, making this special design an unusual departure from the standard type.