Prices of call and put options for P&G stock around 1:30pm on Nov 20 2009

Investopedia explains Expiration Date
The expiration date for all listed stock options in the U.S. is the third Friday of the expiration month (except when it falls on a holiday, in which case it is on Thursday).

Option prices for Nov 20 2009 expiration:

Option prices for Dec 18 2009 expiration:

Option prices for Jan 15 2010 expiration

Option prices for Apr 15 2010 expiration