cTrader Backtesting Using Hours

While doing backtest and optimization, I see the option to add a trading hour.

This trading hour parameter in RSI and Moving Average bot picks the user timezone set in ctrader desktop program or uses NY Timezone.

server time.

Thanks Mike, I have read that before posting this but my doubt remains.

Server time = cTrader = UTC+0 = London Timezone
OR
Server time = local PC as ctrader desktop program is sitting locally.

Server time = cTrader = UTC+0 = London Timezone

Thanks Mike