Gobekli Tepe Archaeological Site and Lunisolar Calendar

Gobekli Tepe in Turkey may house the world's oldest lunisolar calendar and serve as a memorial to a comet strike 13,000 years ago, leading to an ice age and extinction of large animals.

The World's Oldest Solar Calendar at Göbekli Tepe

Researchers uncover the world's oldest solar calendar at Göbekli Tepe, a 12,000-year-old archaeological site in Turkey, which may also be a memorial to a catastrophic comet strike. The ancient timekeeping system tracks lunar and solar cycles and predates other known calendars by thousands of years.