I'm a developer and work in corporate America. No matter what problem is thrown at me, time is consistently the most difficult subject. Listening to 3 project managers trying to figure out a go live time between the UK, Singapore and 3 US timezones is comical. It was around November so the differing day light savings between the UK and US came into play as well.

My life is made difficult since I deal with really old systems designed by Cisco. Server time is whatever windows is set to, so you have to manually add and subtract offsets when dealing with Arizona or other places that don't observe the servers daylight savings schedule.