A valuable article in a convincing way about these matters:1-The certainty of the beginning and the end of Ramadan through viewing the crescent or completing 30 days.2-Not depending on astronomical observatory in determing the beginning and the end of Ramadan. 3-Fasting and break fasting with the community and the masses.4-Religion prohibits fasting the day of doubt.
Praying is the head and fundemental of Islam and the first thing to be accounted for in the day of judgement.It has rulings,pillars,obligatory and supererogatory deeds which are mentioned in this article