I'm the opposite - I'm a night owl but I've been working a 0700 to 1600 schedule lately to keep my employer satisfied.

>It's not so much the number of hours for me, but the exact time. I've always been a morning person and not a night person. It has always been for me (even in the Army) that 3:00-5:00am is a 'deadzone' for me. I cannot think straight or figure things out. I can barely stay awake. As soon as 5:00am hits, I'm wide awake again.
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>>To be fair, I find that after about 8-9 hours code is gibberish and my logic sucks. Didn't used to be that way, so I guess age is a factor.
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>>>>Surely you jest.
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>>>>A few years back at MS Cathy Pountney and I worked in the VFP lab until well after midnight (setup testing I think, Cathy?) and I recall starting that day a bit before 9 AM. I can also recall when I was doing cruise ship inventory and sales systems being up against hard deadlines (end of cruise) and putting in over 24 hours reconciling sales with inventory versus the ship's mainframe and our little Fox app.
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>>>Well, today I'm working from 12 till 7pm. Time to go home again, it's a bit scary walking late at night in this neighborhood as I discovered yesterday...