> Where I'm from(Poland) you always list the salary per month and that's how people talk about it.

Depends on the type of contract. I'm also from Poland and unit I use most often is the daily rate because it's the only reliable way for a contractor to calculate earnings.

Job listings indeed still use monthly, but their understanding of a month is usually "20 workdays", which is obviously off by at least 10%.

Well, if you are a contractor you don't have a salary, strictly speaking.

Over 80% senior job listings are formally contracts around here. It's a popular method of tax optimisation.

You can thank our people’s republic past for that. In the whole bloc and the USSR, monthly has been the standard. It just carried over.

(Troubled post-socialism past and, to some extent, present, in which the vast majority is living paycheck to paycheck with little to no ability to save up, is sure contributing to this mode of thinking.)

Rest assured that in many other EU countries that were never a "people's republic" salary is usually talked about on a "per month" basis.

It's US thing, not English. English would be weekly :-).

I live in UK currently and everyone says their salary per annum :-)

nobody I know (here in England) would say their salary is their weekly earnings. Salary is always per year

When I did a summer holiday job during my A-levels, people talked about hourly rates and got paid weekly; when I was at Aberystwyth at the end of my degree, I remember some local employment scheme that listed pay per week; I think the job contracts after I graduated and before I moved country were usually listing annual pay, but I can't remember. Now I'm in Berlin, discussion is mixed between monthly and annually.

yeah for temporary/part time work you'll often have hourly rates with weekly pay, but that wouldn't normally be called a salary

Sounds like it’s English thing, that monthly- and yearly-income shares the word ;)