Windows End of Support Calendar

The End of Support Calendar shows Microsoft Operating Systems end of support dates, whether they are the end of mainstream support that updates features and cosmetic changes, or extended support, which ends security fixes and all Microsoft technical support other than old web pages.

Security updates for Microsoft Office 2021 end October 13, 2026.

Event Information:

  • Tue
    13
    Nov
    2029

    Windows Server 2025 End of Mainstream Support

    Applies to most editions of Microsoft Server 2025.

    End of mainstream support refers to the date when Microsoft no longer provides feature updates and fixes.