We need to understand the Ramadan begins with the sighting of new moon today evening, after Magrib, which is after sunset.
After analyzing, the data about the setting of sun and moon which is collected over the years, we have come the following results:
The points of observation have been taken from extreme ends of the country – East (Damman), West (Jeddah), North (Tabuk) and South (Khamis Mushait) and also the central region (Riyadh).
It can be seen that moon is will not be visible in Riyadh or the Eastern province. However, other places where it is visible it is only visible for 2-3 minutes only.
Hence we believe that that sighting of moon will be very difficult; the people will look out for moon until one hour after sunset before declaring anything.
As per Gulf news some of the countries have already declared that Ramadan will start from 17th May, 2018. (See https://gulfnews.com/guides/life/ramadan/news/update-ramadan-declared-in-other-countries-1.2221627)
QSaudi.com wishes its viewers Ramadan Kareem.