Examples: starttime=2012-11-29 or 2012-11-29T00:00:00 or 2012-11-29T00:00:00.000
Examples: startbefore=2012-11-29 or 2012-11-29T00:00:00 or 2012-11-29T00:00:00.000
Examples: startafter=2012-11-29 or 2012-11-29T00:00:00 or 2012-11-29T00:00:00.000
Examples: endbefore=2012-11-29 or 2012-11-29T00:00:00 or 2012-11-29T00:00:00.000
Examples: endafter=2012-11-29 or 2012-11-29T00:00:00 or 2012-11-29T00:00:00.000