The new deadline given to them is a 14 day grace period that does not include weekends or public holidays. This is so that companise will have enough time to address the issue and come up with software fix to vulnerability.
According to the Project Zero, The giant tech company noted that they have always played by the same rules even though it is their own tech team working on issues. This means that prior to the policy change, Google too had a 90 day deadline just like other companies. They proposed that Android and Chrome had to meet the same deadline policies as well.