Below is a graph showing the average number of hours worked annually per employed person. I got the data from the Federal Reserve bank of St. Louis' FRED system.
I presume this is a combination of people who work full time and part time and a reflection of the total hours that full time hourly and salary people work. Hard to say if this means more part time jobs or fewer long hours by full time workers. But in any case as a nation the average person is working fewer hours.