The announcement below comes direct from the official Magento website, and the full transcript can be found here.
We understand that many of our Magento 1 merchants need additional time to make the transition to newer versions of Magento. To that end, our software support policies ensure that those customers have the time and confidence to upgrade when it is right for their business. In particular:
For Magento Commerce 1 (formerly known as Enterprise Edition):
For Magento Commerce 1, we are providing software support through June 2020. Depending on your version, software support may include both quality fixes and security patches. Please review our Magento Software Lifecycle Policy to see how your version of Magento Commerce 1 is supported.
For Magento Open Source 1 (formerly known as Community Edition):
For Magento Open Source 1, we are providing software security patches through June 2020 to ensure those sites remain secure and compliant. Please visit our Legal Terms page and review our Magento Open Source Software Maintenance Policy to see which versions of Magento Open Source 1 continue to receive software security maintenance.
Magento software support and/or security maintenance apply only to Magento software and does not apply to third-party extensions or customizations. Maintenance of extensions, customization or other modifications to the Magento codebase, including compliance with security and privacy standards (PCI, SOC, ISO, etc.), are the express responsibility of the merchant.
While we’re committed to supporting the success of all merchants, the time to upgrade to Magento Commerce 2 is now. Magento Commerce 2 delivers superior cloud-hosted performance at scale, freedom from IT bottlenecks with creating, scheduling, and launching compelling content, and true business intelligence capabilities. Plus Magento’s unmatched flexibility enables our global community of partners and developers to deliver virtually any commerce experience in record time and at a superior total cost of ownership. As a result, we’re seeing tremendous community and market momentum for Magento 2 as a whole, now with more than 2,000 available extensions, new capabilities launching quarterly (version 2.3 is on the horizon), and over 8,000 new quarterly Magento 2 site launches on top of 30,000 existing Magento 2 sites.
We encourage all Magento Commerce 1 customers to reach out to their Customer Success Managers or development partners to start their upgrade planning as soon as possible.