LocalTimeZone is a property of the BaseBusinessObject, and it is used to specify if the local time zone that will be used to automatically transform all date times for UTC time to this time zone. this property is only used if the TranslateTimeZones property is set to true.
<appSettings>
<add key="LocalTimeZone" value="15" />
</appSettings>
This property takes a number which represents the key value of a time zone entry in the provided list of time zones and their DST rules.