To find satellite images capture date in Google Map you need to use Google Earth. Google Map uses same imagery used in Google Earth, you can install Google Earth application on your PC and zoom into the area of which you wish to know the captured date at the bottom of the screen shows the Imagery Date .
Dear Dr. Alhamamy and Dr. Hazaymeh, thanks for the reply. Really they are almost identical and unfortunately do not add new information to answer my doubts. I already knew this technique of visualizing the date in Google Earth.
My concern is to find other images date, especially those of the bing map satellite, which even has spatial resolution and radiometric quality superior to google satellite images. The question remains: how do I know the date of bing images? availables in QGIS, for example. I will raise this question to the description of this question.