I know that in Hindi the following are the seven days of a week: Soomwaar, Mangalwaar, Budhwaar, Guruwaar (or Bruhaspatiwaar), Shukrawaar, Shaniwaar, Raviwaar सोमवार मंगलवार बुधवार गुरुवार (or बृहस्पतिवार) शुक्रवार शनिवार रविवार In Urdu, as far as I understand, following are the seven days of a week: Piir, Mangal, Budh, Jumeraat, Jumma, Shanichar, Aetwaar. Urduphones, can you please confirm. Assuming that my understanding is correct, I notice that four of these seven are different from Hindi. What are these names (Piir, Jumeraat, Jumma and Aetwaar) derived from? Are they any way related to planets/stars like in Hindi? like Soom is Moon, Guru is Jupiter, Shukra is Venus and Ravi is the Sun. Note: I have also heard Aetwaar for Sunday in Hindi as well; but I suppose Raviwaar is more correct Hindi.