Patch Tuesday Calendar

Microsoft ships its coordinated monthly security updates on the second Tuesday of every month — the release the industry calls Patch Tuesday. For change managers this is the single most predictable spike in patching, reboots, and change-request volume in the calendar, and pretending it will not happen is how organizations end up freezing the wrong week or scheduling a business-critical release directly into a mandatory reboot window. This tool shows the next twelve Patch Tuesday dates in rolling order, marks the upcoming one, and links each month to its MSRC "Release Notes" page so you can see the exact CVEs, KB numbers, and affected products the moment the advisory drops. The dataset is generated deterministically (second Tuesday of each month) so it stays accurate even when the site is offline from the live MSRC feed. Use it to lay out change-freeze windows, plan pilot rings, and set stakeholder expectations for maintenance downtime. Add the calendar URL to your CAB agenda template so no one has to look it up again.