如何在Delphi中使用DST将历史时间戳转换为不同的时区？

uses
  System.TimeSpan,
  System.DateUtils,
  System.TimeZone;

function ConvertTimestampToTimeZone(timestamp: TDateTime; timezone: string): TDateTime;
var
  tz: TTimeZone;
  localTime: TDateTime;
  utcTime: TDateTime;
begin
  tz := TTimeZone.Create(timezone);
  try
    localTime := timestamp;
    utcTime := localTime - tz.GetUtcOffset(localTime);
    Result := tz.ToLocalTime(utcTime);
  finally
    tz.Free;
  end;
end;