Node red time zones offset in Dashboard chart

Actually getting the data from a specific application this data has Value and timestamp field.
So assuming I have the data now (value and timestamp which is in GMT+8), If I had to convert the timestamp to UTC (GMT+0). for example:

Value: 25, timestamp: 2020-03-02 08:00:00 PM
so if I converted it on UTC
Value: 25, timestamp: 2020-03-02 12:00:00 PM

Am I right on this?
but If I will plot this to Chart/Trend it will show 8 PM on X-axis radther than 12 PM ?

Will it be unconventional way to do it ?