Google's before and after search operators, introduced six years ago, remain in beta. Despite their longevity, users often find them helpful for filtering search results by specific dates. These operators allow searches with year, month, and day specifications, although Google's ability to pinpoint exact publication dates remains challenged due to inconsistent practices among web publishers. As highlighted by Google Search Liaison Danny Sullivan, the functionality serves power users but also reflects ongoing issues with date tracking across the web.
Yes, Google has issues understanding when content was first posted and that is not new either.
You must provide year-month-day dates or only a year. You can combine both.
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