September 20, 2026, is notable in the lunar calendar as it is designated the Day of the Rooster, falling within the lunar month of the Rooster. This month, which started on September 11 and runs until October 9, consists of 29 days. Today also marks the 14th day of the Bạch Lộ season, which signifies a transition in weather patterns in Vietnam.

In addition to its significance in the lunar calendar, September 20 is recognized globally as World Cleanup Day. This annual event, held on the third Saturday of September, mobilizes millions of volunteers across more than 190 countries to participate in environmental clean-up activities. The initiative aims to raise awareness about pollution and encourage sustainable practices among communities.

Furthermore, today is celebrated as the International Day of University Sport, a day established by UNESCO to highlight the role of sports in education and social values. This day emphasizes the importance of dialogue, respect, and fair play among students and aims to promote physical activity within educational institutions.

As the world observes these significant events, it is a reminder of the importance of community involvement in environmental issues and the role of education in fostering a healthy lifestyle.