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
    11
    Nov
    2025

    Windows 11 23H2, Second half 2023

    Windows 11 version 23H2, released October 31, 2023, reaches end of service and the end of security patching, on November 11th, 2025.

    This date marks the last security update for the feature release 23H2 of Windows 11 Home and Windows 11 Pro.