First Roza?

[Sadiyah]

Re: First Roza?

@mAd_ScIeNtIsT

The idea is that since the position of the moon and the sun relevant to any point on the earth, at any point in time, is always known, you can tell before hand if the earth, moon, and sun and going to be lined in a way that produces a visible moon on a particular day.

The only thing that should prevent a moon sighting on such a day is cloud cover.

I'm not very knowledgeable about the details of preset lunar dates. Are the dates announced mere forecasts (that might change) or are they actual days with no doubts and discrepancies, and are more like facts?