SystemTimeToTzSpecificLocalTime
SystemTimeToTzSpecificLocalTime is a Windows API function that converts a UTC (Coordinated Universal Time) SystemTime structure into a local time based on a specified time‑zone context. It is declared in kernel32.h and implemented in Kernel32.dll. The function takes two parameters: a pointer to a TIME_ZONE_INFORMATION or *LOCAL* structure that describes the target time zone, and a pointer to the source SYSTEMTIME. It outputs the adjusted local time into a supplied SYSTEMTIME structure. The routine automatically accounts for daylight‑saving time rules, offset adjustments, and era changes, returning TRUE if the conversion succeeds or FALSE if the input is invalid or the time zone structure cannot be parsed.
The function is often used in applications that must display dates and times to users in their
Developers sometimes prefer using the newer function SystemTimeToTzSpecificLocalTimeEx, which accepts a TZSpecificLocalTime structure and allows for