It’s ABBA’s 40th anniversary. 40 years since the unforgettable performance that introduced them to the world. 40 years of spreading joy and inspiration. It’s ABBA’s anniversary, and as on every anniversary – there should be a greeting card. A way of saying thank you. A link between you and ABBA. Simply write a greeting, preferably in English or Swedish. The greetings will be printed at a installation at ABBA The Museum, as well as saved in the greetings feed on the website. The greetings will then be presented to the ABBA members.