The interesting thing about Burushaski names of the days (of week) is its close resemblance with the Sanskrit names. It may be that Burushaski has borrowed these names from Sanskrit language but nothing can be said with certainty in the absence of historical evidence.
Burushaski------------------------------------------Sanskrit
Adit----------------------------------------------------Aditya bar
Chandurar-------------------------------------------Sambar
Angaru-----------------------------------------------Mangal bar
Budu-------------------------------------------------Budu bar
Barespat--------------------------------------------Brihaspati bar
Shukuru---------------------------------------------Suka bar
Shimsher---------------------------------------------Sanichar bar