if you add a location, it gives you the right answer... example: http://www.wolframalpha.com/input/?i=hours+between+1pm+march+10+and+1pm+march+11+2012+in+new+yo

if you add a location, it gives you the right answer... example: http://www.wolframalpha.com/input/?i=hours+between+1pm+march+10+and+1pm+march+11+2012+in+new+york http://www.wolframalpha.com/input/?i=hours+between+1pm+march... 0.9583 days = 22 hours 59 minutes 57 seconds the time change does not apply everywhere, in places near the equator there is no daylight saving time change.