“a party did take place there on 18 December”
18 December?
This pertains to 2020. Folks just now figured out that a party occurred (a year ago almost).
FYI - In the UK and most of the rest of the world, the standard date format is DD-MM-YYYY as opposed to the US which is DD-MM-YYYY.
When I managed the UK payroll for our US subsidiary, it took some time getting used to.