August 1 is observed worldwide as a day of various significant holidays and events. In China, it marks Army Day, commemorating the founding of the People's Liberation Army in 1927. Switzerland celebrates its National Day, which honors the anniversary of the country's foundation. Many former colonies, including Barbados and Jamaica, observe Emancipation Day, celebrating the abolition of slavery in 1833. In the Democratic Republic of the Congo, Parents' Day is celebrated, recognizing both mothers and fathers. Additionally, World Lung Cancer Day is observed to highlight lung cancer prevention and screening. Nicaragua honors Saint Dominic with colorful processions, while Peru celebrates National Alpaca Day to recognize the economic importance of alpacas. Other observances include International Childfree Day and Women Astronomers Day, both promoting specific social causes.