I have new 9780, before that i was using Nexus One and its a big diff.
My week starts from Sun to Thru, and i want to set these as weekday for alarm can any one suggest how is possible.
Alternative suggestion is to use Multi Alarms. It's a (free) standalone app, but it lets you choose which days you want to sound the alarm. Easier to disable if you go on vacation than reconfiguring 5 calendar entries. Not perfect either, but may be close enough for your purposes.