sols

Just read about this yesterday, et. A sol is a Martian day, equivalent to about 24 hours and 39 minutes. The article was talking about how difficult it is for NASA scientists to adjust to the working schedule dictated by the Martian day. NASA controllers schedule work for the solar-powered rovers during (Martian) daylight hours. NASA workers who started at 8 am at the beginning of the mission were starting after noon just a week later, and the disparity will only increase as the 90-day mission continues. NASA posts dual clocks in the lab so workers will always know the time on both planets.

Will try to find a link to the story - things I never thought about as complications!

EDIT: http://www.detnews.com/2004/nation/0401/25/a05-44784.htm