The upcoming Windows 10 update on April 8, 2025, will remove the display of seconds in the Calendar flyout. This change is part of the Windows 10 KB5053643 optional update, which is being rolled out but will not install automatically. The Calendar flyout will still appear when users click on the time and date in the taskbar, but it will no longer show seconds. Microsoft has previously cited performance concerns as the reason for excluding seconds from the graphical user interface. Support for Windows 10 is set to end on October 14, 2025.