600

600 (DC) was a leap year starting on Friday of the Julian calendar, the 600th year of the Common Era (CE) and Anno Domini (AD) designations, the 600th year of the 1st millennium, the 100th and last year of the 6th century, and the 1st year of the 600s decade. As of the start of 600, the Gregorian calendar was 2 days ahead of the Julian calendar, which was the dominant calendar of the time.

• The population of the Earth rises to about 208 million people.
• Smallpox arrives in Europe for the first time.
• King Ingvar of Sweden invades Estonia but is killed by the locals.
• Juchau Anglo-Saxon tribesmen arrive in England.
• The Persians begin to use windmills for irrigation.
• Chaturanga is played in India.
• Loma Caldera in El Salvador erupts.
• The Hopewell culture of North America becomes less popular.
• The Aztec city of Teotihuacán begins to get unstable.
• The moldboard plow is invented in eastern Europe.
• Pope Gregory I writes what comes to be known as Gregorian chant.
• The building on the monastery of St. Catherine is begun on Mount Sinai.
• Irish missionaries pray in Scotland and Germany.
• Chinese-influenced sculptures of Buddha begin to be created in Japan.
• Sumatra, Java, and the surrounding islands are changed to believe inBuddhism.
• Augustine of Canterbury changes Ethelbert of Kent's religion to Christianity (approximate date).
• Nubian rulers become Christian (approximate date).

• Ali Ben Abu Talib, the fourth caliph of Islam
• Candrakirti, Indian Madhyamaka philosopher

• Venance Fortunat, bishop of Poitiers, one of the last representatives of Classical Latin poetry
• King Beop of Baekje, king of the Baekje Kingdom of Korea
• Yang Jun