On Wednesday, November 19th, 1969, a dark and cool day (max 11.9°C) without sun, W.S.G. Abacus was founded and that should be celebrated! Therefore, the Dies committee will organise the Dies Natalis of Abacus every year around the date of 19 November and fill the day with activities. This usually consists of fulfilling fun tasks for a week until the Dies itself and on the day itself a special lunch will be made, a drink will be held in the afternoon and a catered evening dinner will be taken care of and then you have a nice evening. The Dies also usually has a theme that will be announced in a fun way.