The 1132CU with Smart Home Manager used a file called LatLong.ini.
When you set the Sunrise Sunset. You picked a state and close city. It has Latitude and Longitude settings in it. For the state and close city. Some of us modified the ini file so that the incorrect DST change dates that where not fixed where correct.
We turned Off DST and twice a year at the change date. To get the correct Sunrise and Sunset.
Here are two lines from the file. New York and Miami Florida.
USA,New York,NYC-CentralPark,40,N,73,W,-5
USA,Florida,Miami,25,N,80,W,-5