There was a thread on this topic a couple months ago on the AAVSO discussion-list. Most of the responses dealt with problems related to shift-work, where one is going back and forth between an ordinary day schedule and a night schedule. It is easy to imagine health problems associated with that. My response on this thread was the only one from someone on a fixed and quite regular "very late" schedule: http://mira.aavso.org/pipermail/aavso-discussion/2005-August/008878.html ...which doubtless convinced a lot of people I live an ascetic, very hair-shirt-y existence and that I'm as strange as I seem to be. \Brian -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.