User Timezone Offset
Your user timezone offset as defined in your NetSuite preferences under Home --> Preferences --> Time Zone. Ex: -8:00.
NetSuite returns dates offset based on your user timezone preferences. This applies only to Dates, and not to Datetimes, which always return the same way no matter your preferences. We attempt a best effort to automatically correct for this and return dates as they would appear in the NetSuite UI. However, this is not 100% perfect due to how a few time zones are offset by 24 hours or greater depending on daylight savings time. If your user preferences are set to +13:00, +12:00, or -12:00, this value must be specified to get dates to show up correctly. For other offsets it is not required but recommended for best accuracy.