Nice one Helmi_c. Hadn't even gotten there yet. Here are the registry entries for the daylight timezone fix.
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Timezones\10]
"Display"="GMT-7 Mountain US"
"TZI"=hex:A4,01,00,00,00,00,00,00,C4,FF,FF,FF,00,0 0,0B,00,00,00,01,00,02,00,00,00,00,00,00,00,00,00, 03,00,00,00,02,00,02,00,00,00,00,00,00,00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Timezones\20]
"Display"="GMT-6 Central US"
"TZI"=hex:68,01,00,00,00,00,00,00,C4,FF,FF,FF,00,0 0,0B,00,00,00,01,00,02,00,00,00,00,00,00,00,00,00, 03,00,00,00,02,00,02,00,00,00,00,00,00,00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Timezones\3]
"Display"="GMT-9 Alaska"
"TZI"=hex:1C,02,00,00,00,00,00,00,C4,FF,FF,FF,00,0 0,0B,00,00,00,01,00,02,00,00,00,00,00,00,00,00,00, 03,00,00,00,02,00,02,00,00,00,00,00,00,00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Timezones\35]
"Display"="GMT-5 Eastern US"
"TZI"=hex:2C,01,00,00,00,00,00,00,C4,FF,FF,FF,00,0 0,0B,00,00,00,01,00,02,00,00,00,00,00,00,00,00,00, 03,00,00,00,02,00,02,00,00,00,00,00,00,00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Timezones\4]
"Display"="GMT-8 Pacific US"
"TZI"=hex:E0,01,00,00,00,00,00,00,C4,FF,FF,FF,00,0 0,0B,00,00,00,01,00,02,00,00,00,00,00,00,00,00,00, 03,00,00,00,02,00,02,00,00,00,00,00,00,00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Timezones\50]
"Display"="GMT-4 Atlantic US"
"TZI"=hex:F0,00,00,00,00,00,00,00,C4,FF,FF,FF,00,0 0,0B,00,00,00,01,00,02,00,00,00,00,00,00,00,00,00, 03,00,00,00,02,00,02,00,00,00,00,00,00,00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Timezones\60]
"Display"="GMT-3:30 Newfoundland"
"TZI"=hex
2,00,00,00,00,00,00,00,C4,FF,FF,FF,00,0 0,0B,00,00,00,01,00,02,00,00,00,00,00,00,00,00,00, 03,00,00,00,02,00,02,00,00,00,00,00,00,00