Nam, a programmer for a multinational technology company, works from 10 p.m. to 4 a.m. due to time zone differences.
To synchronize his work with colleagues and clients in the U.S., the 27-year-old from Ho Chi Minh City stays up at night.
His day typically starts at 10 a.m. and his work begins in the evening. He participates in online meetings, writes code, fixes bugs, and deploys projects, often working until 3 a.m.
Then he winds down by browsing social media, watching movies or listening to music before going to bed at 4 a.m.
The subversion of his circadian rhythm results in memory loss, difficulty concentrating and lethargy during the day. He has also gained weight, and his skin has darkened and developed acne.
He says: “It was not until now that I realized the harm of…