The International Concertina Association sponsors World Concertina Day on February 6 every year. The first one was held in 2022, and they are now starting to work on World Concertina Day 2025! The ICA encourages everyone with an interest in the concertina to participate in this annual event by organizing or taking part in an event in your local area or online.
For all further information: https://concertina.org/