20th Anniversary

The 20th anniverasary of Windows XP will be celebrated on October 25 2021 (counting the GA date, not the RTM date on August 24). It is a highly anticipated milestone because Windows XP was still in common use until relatively recently, and because Windows XP had many features that make it especially nostalgic. There is an expected increase in the amound of retro builds for XP gaming, plus more people will be trying Windows XP again.

Windows 95
Windows 95 celebrated its 25th anniversary on August 24 2020 and gave a peek in to the kind of celebrations XP will have when it reaches 20.

19th Anniversary
The 19th Anniversary of XP was celebrated on October 25 2020.