Border-time on month pillar / Solar time adjustment correct?

[mona]

Hi, I plotted this birthday yesterday:

7. Aug 1973 at 20:40. Longitude is 29.03 (asian part of the city Istanbul)

This seems to be a time when the month energy changes, so the month pillar has indicated border time on bazi-calculator.com

I was aware of such borders in the hour pillar, as you might not really know the birth time exactly. But month pillar is really new to me. So in this case, is the correct month energy Geng-Shen or Ji-Wei? Do I have to ask the person questions about her career and wealth in order to get clues? How do you handle this situation?

I also know, that there is the practise of neglecting the location and ploting the birth chart only using the local time, saying this will all be good and corrrect. If this topic has already been discussed, I would be happy, if you could guide me to the thread, so I can read about it.

[Gmuli]

If you have doubts checking up past events and aligning it to the charts always works.
You will likely get nicer feel for how the chart works even if it turns out not needed.