I hadn’t until recently when I decided that I work best from about 08:00 - 12:00 and 15:00 - 18:00. (although 0600-0800 can also be very productive when I don’t have children needing my attention)
Knowing this allowed me to plan my working day better. My team of 8 in India work 24/7 within three daily shifts.
Last time I was in India I planned my day in two blocks so that I could be in the office for 4 hours either side of two change over times. This meant going in at 12:00 until 16:00 and then again 20:00-00:00, leaving me 4 hours in the middle of the day for ‘me’.
These sound like odd times to work but there was method in my madness. In working these hours I could keep my body on UK time which is 4.5 hours behind India. So I get up at 10:00 and go to sleep at 02:00, thus fooling my body that it is still in the UK!
On this trip I am doing the same and yesterday the penny dropped when I realized that the times I have chosen to work correlate with my most productive hours if you consider that my body is working on UK time while I am in India.
Wow, I can’t believe how much there is to learn about yourself when you take time to ‘listen’!

October 22, 2008 @ 6:19 am
I find that the early hours work really good for me - 5-7am in the morning. It’s also a time of the day when I can be reasonably confident that my mobile phone is not going to ring. Its also very peaceful at the time.
October 23, 2008 @ 6:37 pm
I work in the day but my brain does a lot in the night!
Generally I prefer the afternoons, with a cup of coffee and a nice view to inspire thinking.