no, the time zone on the VPS or on your computer does not have impact with these EAs.
The EAs are on M15 chart and this chart is one and the same on all time frames. Same as M1, M5, H1 chart. Now the H4, D1, W and M charts have differences as their open and close prices are different with the different time zones.
For example, here in Bulgaria we are two hours earlier than UK. So our H4 candles open 2 hours earlier, just in the middle of the UK H4 candles.
So if you are trading on any of the lower times frames, you can select any Forex VPS that works for you.