What do you want to change to/why ?
The date/time on charts comes from the data feed, see 'Equis Real-time Configuration' which has a check-box for using the computer's time.
Haven't tried it on my forex charts which display Moscow/GMTime, did take some finger counting to work out Pacific time, here's the code for an indicator to display a vertical line/s at specified times (thanks Harold):
Hours
StHour:=Input("start Hour",0,23,14);
StMin:=Input("start Minute",0,59,0);
EnHour:=Input("end Hour",0,23,16);
EnMin:=Input("end Minute",0,59,0);
start:=Hour()>StHour
OR Hour()=StHour AND Minute()>=StMin;
end:=Hour()<EnHour
OR Hour()=EnHour AND Minute()<=EnMin;
start AND (end OR (start AND Alert(start=0,2)))