Google has done away with the timestamp of in the last week for reviews. Instead of placing a date time stamp, Google knows show how many minutes ago a review was posted up to the 60-minute mark. Google then switches a the hour format until it becomes a full day. Yep, you guessed it Google then shows many days ago the review was posted until it becomes a full week. Personally, it would be more helpful for Google to show the date the review was posted, but I will take what I can get, or what Google gives us.
Review in hours