AdSense is an advertising program run by Google. Web site owners can enroll in this program to enable text and image advertisements on their sites. These ads are administered by Google and generate revenue on a per-click basis. Google utilizes its search technology to serve ads based on website content, the user's geographical location, and other factors. Those wanting to advertise with Google's targeted ad system may sign up through AdWords.
You can't put it in the post, the post is dated. We've been down this road before. Google does not allow that cause the date is misleading. They want the ad to be fresh, not dated.