Documenting this for other users who might care…
A new function DaylightSavingsTimeOffset( apparently uses Apple’s code to calculate the current daylight savings time offset for different zones or locations. This function has 2 parameters: Timezone & Date. But as timezones occur not at midnight, but rather at different times of the day, If your application need true accuracy, you will need to take the time into consideration. You may not be creating airline schedules, as I am not, but my application did need to consider the time zone savings time, time of day when scheduling for global locations.