Hadrat Abu Hurairah (Radi Allaahu Ta’ala Anhu) narrated that the Prophet (Sallallahu Alaihi Wa Sallam) said: “It is the duty of every Muslim to take bath once a week (i.e. on Friday), washing his head and body.” [Bukhari, Muslim, Marif -ul- Hadis]
Hadrat Samura bin Jundab (Radi Allaahu Ta’ala Anha) narrated that the Messenger of ALLAH said: If any one performs ablution on Friday, well and good; but if any one takes bath, bathing is more excellent. [Ahmad, Abu Dawud, Tirmizi, Marif -ul- Hadis]
(1) For those whom it is obligatory to attend the congregational Salaah on Friday, it is masnun to take bath at any time between the Morning Salaah (Salaah fajr) and the congregational Salaah. (Jumah Salaah)
(2) So is the case with Salaah Eideen.
(3) It is masnun to take bath before donning lhram.
(4) For on performing Hajj it is Masnun to take bath on the day of ARFAH after the sun has crossed meridian. [Bahishti Gohar]