Bill Gates' birthday (Microsoft founder), October 28. Bill Gates was born on this date in 1955 in Seattle, Washington, United States. He is recognized as a prominent figure in technology and entrepreneurship, having co-founded Microsoft and played a significant role in the development of computer software. Together with Paul Allen, Gates established Microsoft in 1975, and the company quickly grew into one of the world's largest technology corporations. During the 1980s and 1990s, Microsoft made a major impact on global computer usage with the release of the Windows operating system and Office software. Gates served as CEO of Microsoft until 2000, after which he shifted his focus to philanthropy through the Bill & Melinda Gates Foundation. The foundation works in areas such as health, education, and poverty reduction, and is considered one of the largest private charitable organizations worldwide. Bill Gates' birthday was designated in the Gregorian calendar year 1955 as a notable event in the history of technology, and for this reason, it is included in the calendar.