The question lists 2007, the year when Ban Ki‑moon began his term as UN Secretary‑General.

Muhammad ibn Musa al-Khwarizmi was a polymath whose work in mathematics and astronomy was foundational. He is often called the father of algebra, and his treatises introduced the decimal positional number system, including the use of zero, to the Western world. His astronomical tables, known as Zij al-Sindhind, were highly influential, providing essential data for celestial calculations that were utilized by scholars across the Islamic world and later translated into Latin for European astronomers.

Muhammad ibn Musa al-Khwarizmi was a Persian polymath who made fundamental contributions to mathematics, astronomy, and geography. His work on the Hindu-Arabic numeral system was instrumental in introducing the concept of zero to the Western world. Additionally, his astronomical tables, known as Zij al-Sindhind, were highly influential, providing a framework for astronomical calculations that were utilized by scholars across the Islamic world and later in Europe.

To determine the day, we calculate the number of odd days. From February 18, 2005, to February 18, 2006, is one year (365 days), which contains one odd day. From February 18, 2006, to February 18, 2007, is another year, also containing one odd day. Total odd days equal two. Adding two days to Friday results in Sunday.

Benazir Bhutto, the first woman to lead a Muslim-majority nation, was assassinated on December 27, 2007. The attack occurred in Liaquat Bagh, Rawalpindi, following an election campaign rally. Her death was a major turning point in Pakistani politics, leading to widespread national mourning and significant changes in the political landscape, including the subsequent general elections held in 2008.

In September 2008, the provincial government of Sindh officially renamed the Nawabshah District to Shaheed Benazirabad. This decision was made to honor the memory of the former Prime Minister of Pakistan, Benazir Bhutto, who was assassinated in December 2007. The renaming reflects the political and social significance of the region in the context of Pakistan's modern political history.

Leonid Hurwicz was awarded the Nobel Memorial Prize in Economic Sciences in 2007 for his work on mechanism design theory. At the time of the announcement, he was 90 years old, making him the oldest person to ever receive a Nobel Prize at that time. His contributions significantly advanced the field of microeconomics and game theory.

Microsoft Office has been released under various names and years, such as Office 2007 and Office XP. 'Office Vista' is not a valid version of the productivity suite, as Vista was the name of a Windows operating system, not an Office release.

The Quadrilateral Security Dialogue, involving the United States, Japan, Australia, and India, was initially proposed in 2007 but remained dormant for several years. It was officially revived and re-established in 2017 on the sidelines of the ASEAN Summit in Manila. This strategic forum aims to promote a free and open Indo-Pacific region through diplomatic and security cooperation among its member nations.

For over a century, South Africa was the dominant global producer of gold. However, in 2007, China surpassed South Africa in annual gold production. Since then, China has consistently maintained its position as the world's largest gold producer, driven by extensive mining operations and significant domestic demand for the precious metal.