Just realised something I though was tomorrow (23rd of the month) is actually next week. I think I misread dd/mm/yy (UK style) as yy/mm/dd (big endian).
For context, I like and use #ISO8601 style #yyyy-mm-dd dates, familiar to computer people as they sort chronologically, and people who've lived in Japan as they use that order.
I strongly dislike dates written with two digit years. You can probably guess, I hate the USA mm/dd/yy style with a passion.