‏الصيام : Hadeeth No:2379 Abu Huraira reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: Observe fast on sighting it (the new moon) and break (fast) on sighting it (the new moon), but if the sky is cloudy for you, then complete the number (of thirty)....

‏الحج : Hadeeth No:3009 This hadith is narrated on the authority of Hisham with the same chain of transmitters....