Yes, that's if you have the new up to date one which is created by microsoft...
Not yet for Google Earth. Google recently created historical imagery for Street View on Google Maps. If historical imagery is available then a clock and date will be displayed in the upper left of the map.
Google gives the copyright date as the current year, because that's the date the page rendered.
Planet Google was created in 2008.
Google Notebook was created in 2006.
Google eBooks was created in 2010.
Google Play was created in 2008.
Google Offers was created in 2011.
The Google Book was created in 1913.
Google Hacks was created in 2003.
Google Videos was created in 2005.
Google China was created in 2005.