Date Range as "Optimizer" parameter

I'd like to test my strategies on different periods at the same time.
At the moment I use a parameter to compare the same strategy in different years, but it is really complicated.

                if (Server.Time.Year != Year)
                {
                    return;
                }
                else if (Server.Time.Year > Year)
                {
                    Timer.Stop();
                    return;
                }