Hi Ashwin,
As per my understanding you want to get the Weekstart- Weekend date , Weekname.
you are try creating 2 formula
to display Week start -Week end (like 8/21/2012-8/27/2012 )
Date({Orders.Required Date}-DayOfWeek ({Orders.Required Date},crsunday)+1)&' - '&Date({Orders.Required Date}+7-DayOfWeek ({Orders.Required Date},crsunday))
Weekname (like monday, sunday etc)
WeekdayName (DayOfWeek ({Orders.Required Date},crsunday))
Here replace the Orders.Required Date with your DB Date field.
Hope this works for you.
Cheers,
Kiran