[PowerBar]

Canada is even worse, we can't decide which one to use so you never know what format it's in.

I was once sent paperwork to fill out that had dates requested in both MM/DD/YYYY and DD/MM/YYYY formats on different pages.

[notatoad]

the upside of Canada's incredibly stupid date formats is that nobody complains when you try to use ISO8601 format instead, we're all somewhat used to date formatting being flexible.

My american users get very angry when they see a date that isn't in dd/mm/yy format.

[nayuki]

Corrections: Most but not all government forms in Canada use yyyy-mm-dd format, which is a positive change. But indeed we are used to living in a mishmash of American, European, and ISO influences. Americans might get angry if you don't use mm/dd/yy format; I'm not aware of them being attached to dd/mm/yy.