Data formats are standard and are defined by the SOAP specification.
A Note on Dates
yyyy-mm-ddThh:mm:ss.nnn+|-hh:mm as the date/time format. For example, December 14 1984 12:14:37 would be
1984-12-14T12:14:37.000-04:00. You can (and should) specify a timezone offset if you do not want the system to assume you are providing a time in UTC (Universal Coordinated Time / Greenwich Mean Time). For the Eastern Time Zone on Daylight Savings Time, this would be