Hit advanced button, while selecting places it should automatically sets all the coordinates and timezone for you. You can observe this while selecting different places.
If it's not working properly clear cookies and cache . (Google this)
In case if you are loading saved horary or saved profile you should delete and readd or need to edit old saved data
PS : all our tools automatically adjusts DST - day light saving time . You need not to do it manually
We recommend you to always double check all the details before analysing anything .
For now we are closing this discussion.