Here is a chart of all the emails I’ve sent in the last 7 years (~5000) plotted according to the time of day [inspired by the true nut of data analysis]. Dark blue means less emails sent at that time, red is more. I can see a period of major inactivity during the night – this must correspond to unconsciousness. There’s a nice dinner vacuum visible around 8-9 pm and a curious decline in outgoing communication in the tail months of 2009. I’m not sure what was going on then. There also might be a small trend towards earlier wake-ups since 2005. I’ll have to wait another few years before trying to interpret that curve though.