Time zone for backtesting ea.

 
Hello boys and girls.
Im new to mt5 and i have currently my EA bot running backtestings. The problem is that i want to backtest whole year of data but my strategy work only on specific time in day ( market open ). The problem is that we have summer time and winter time where hours changes. So my question is how to backtest whole year and to have always market open time on chart ? When i test in mart its 10am but after mart is 9am so how can i set it to always backtest on open market.
 
There is no option to do that through the Strategy Tester, so the only way to accomplish it is through your EA's code and settings.
Reason: