… and eat and drink until the white thread (of light) becomes distinct to you from the black thread (night/darkness) of the dawn. Then strictly observe the fast until/to the night...
Qur'an (2:187)
I dont know Arabic so forgive my thickness.
Maybe it depends on if you are able to make the distinction, through experience or location.
These days we all live by clocks so it's different..
But yeah feel free to contribute.
It's not really an argument either way, for me anyway... I see no practical difference between the two..
So you have to know and explain why it bothers you.
Try googling prayer timetables for uae or something..
I did.
They close fast about 10 min before prayer, although it may be an inaccurate timetable.
In the end, I feel it's more important to actually observe the fast properly.
To keep your intent clean and try to overcome our nafs.
Allah swt accepts whatever is acceptable to him.
...people are always in dispute though.. in the end we all still have to live in the world.
So now you can move onto who started fasting when..
People dont know what day it is never mind what time it is...
I'm kidding but only just.
Worth a watch..
https://youtu.be/FMJH-cvjehY