Is there a way to find out when a particular contact in my Google Contacts addressbook got created?
This information is not traditionally exposed through the Google Contacts online interface. However! You can get access to "created" and "updates" dates and times using the Google Contacts API.
If you're not a developer, you can use the API Playground to visually walk you through making a request to the Google Contacts API to get the data you want.
I would walk you through doing this with screenshots but I don't have enough rep to do so yet.