The Mystery Behind Windows Updates: Why Tuesday?
2026-01-25 / Read about 0 minute
Author:小编   

Since October 2003, Microsoft has set a consistent schedule for its monthly cumulative updates for Windows, releasing them on what is known as 'Patch Tuesday' (the second Tuesday of every month, which typically translates to early Wednesday morning Beijing time). The rationale behind opting for Tuesday instead of Monday stems from the fact that Mondays are often the busiest days for IT administrators, who are typically swamped with catching up on unresolved issues from the previous week. By releasing updates on Tuesday, Microsoft offers IT teams a 'golden window' for deploying and verifying these updates without the added pressure of Monday's workload.

The strategy of monthly aggregated updates is designed to alleviate operational stress, ensuring that IT departments can manage updates more efficiently. Meanwhile, critical vulnerabilities that demand immediate attention are swiftly dealt with through 'out-of-band updates,' which are released outside the regular update cycle. Since 2018, Microsoft has leveraged AI models to refine its update delivery approach, strategically deploying updates in batches according to the varying risk levels of different devices. This ensures a more tailored and secure update process.