History shifts an hour after daylight saving change

When the US clocks changed today, all my chart history before Nov 1 moved back an hour. ATAS only lets me pick a fixed offset like UTC-5 or UTC-6, and whatever I pick gets applied to the whole history, summer and winter.

So now on Oct 30 the NY open shows at 7:30 CT instead of 8:30. My session volume profiles are off too. NY open trades are sitting inside the London profile, which changes the shape of London and every level I mark from it. Same thing with anything that uses a time filter like VWAP or daily lines.

The only way around it is to switch CME to UTC-5, reload my template to look at March to October, then switch back to UTC-6 before I trade live. And if a chart crosses the time change, one side is always wrong.

Could you add real time zones like Central Time or Eastern Time that know when daylight saving starts and ends, so each day in history uses the right offset? TradingView already handles it this way. For anyone backtesting with session profiles, being an hour off throws everything off.