Google Search by Time Period
You can easily search Google by a specific time period. Open a new page on your desktop to google.com. Click search tools under the search bar. A new bar opens below that lets you search by time periods.
Similar, open a new page on your mobile phone to google.com. Drag your finger to the left under the search bar to reveal search tools.
Note: The actual time period Google returns specific dated results will be the time Google indexed the website.