Note: Google extended the time before the transition. Owners will lose edit access to their classic Google Sites beginning June 1, 2022. Classic Google Sites will no longer be viewable beginning July 1, 2022.
Google is completing the transition from the classic Google Sites to new Google Sites. On December 1, classic Google Sites owners will lose the ability to edit their pages. Starting January 1, classic Google Sites will no longer be viewable. To avoid this occurring, owners should convert their sites now. Use Google's Classic Site Manager tool to begin the conversion. It's recommended that owners download an archive of their sites as well.
Learn how new sites compare to classic Sites on Google's website.
Learn more about this transition on [U]Tech's Google Sites page.