Daylight saving time arrives a little earlier - March 11 - and stays a little later - Nov. 4 - this year. And it's bringing a problem along with it that could affect everything from stock trades to airline schedules to your BlackBerry.

Software created before the law mandating the change passed in 2005 is set to automatically advance its timekeeping by one hour on the first Sunday in April, not the second Sunday in March. Congress decided that more early evening daylight would translate into energy savings.

The result is a glitch reminiscent of the Y2K bug, when cataclysmic crashes were feared if computers interpreted the year 2000 as 1900 and couldn't reconcile time appearing to move backward. If banks and other institutions aren't properly prepared, automatic stock trades reportedly might happen at the wrong hour, buildings that unlock at a certain time could stay shut, and airline flight schedules could be scrambled.MSNBC