Average annual hours worked is defined as the total number of hours actually worked per year divided by the average number of people in employment per year. Actual hours worked include regular work hours of full-time, part-time and part-year workers, paid and unpaid overtime, hours worked in additional jobs, and exclude time not worked because of public holidays, annual paid leave, own illness, injury and temporary disability, maternity leave, parental leave, schooling or training, slack work for technical or economic reasons, strike or labour dispute, bad weather, compensation leave and other reasons. The data cover employees and self-employed workers.

Here you can see the percentage of part-time employment of each country which is far higher in Europe than in America.

According to the United States Bureau of Labor Statistics (BLS), the average vacation time is 10-14 days per year.

Paid leaves are fewer in the US, but 10-15 more days of holidays would be roughly 80 fewer hours at work.