The Mountain View-based company had previously said employees would be given the work-from-home option through the end of 2020.
COVID-19 RISK CALCULATOR: Quiz yourself on the safest, most dangerous things you can do as California reopens
This updated policy affects nearly all of the 200,000 full-time employees and contract workers who work for Google's parent company, Alphabet.
Employees have been working from home since March because of coronavirus concerns, but this extended work-from-home deadline could pressure other companies to follow suit in a period when California is seeing COVID-19 cases and hospitalizations rise dramatically.
Many other tech companies have tentatively set their return dates for January.
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