singapore

usually monday to friday but 5.5 working days for some other companies (referring to white collar job btw)

so if you just assume it's 5 day week, then it would be 25 working days approximately a month, times 12 would be 300

this year we have 10 public holidays and that's again under assumption that these holidays falls on non weekend (if fall on saturday, it's considered as gone)

so 300 - 10 = 290

so ya, that's about that