You can tell that this is was a Thursday because of the plaid shirt.  On Thursday mornings, Grantley has been learning auto mechanics at Strites Garage and a button down shirt has been his uniform.  This has been a very enjoyable learning experience.  The Guitar?  This was the Thursday before performathon on St Patrick's Day and Grantley was learning some Irish songs before making breakfast or was this it lunch?  I'm not sure.