‏الصلاة : Hadeeth No:1808 Ibn 'Umar reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: When the rim of the sun starts appearing defer prayer till it completely appears, and when the rim of the sun disappears defer prayer till it completely disappears....

‏الصيام : Hadeeth No:2545 Abu Huraira (Allaah be pleased with him) reported the Prophet of Allaah (sallAllaahu alayhi wa sallam) as saying: None among you should observe fast on Friday, but only that he observes fast before it and after it....