How is the Aztec calendar similar and different from ours?

The Aztec calendar is similar to the Gregorian calendar in that both are used to track time and organize daily activities, but it is structured differently. The Aztec calendar consists of two main cycles: a 260-day ritual calendar called the Tonalpohualli and a 365-day solar calendar known as the Xiuhpohualli, which interlock to create a 52-year cycle. In contrast, the Gregorian calendar is a single, linear system of 12 months based on the Earth's orbit around the sun. Additionally, the Aztec calendar incorporates significant religious and cultural elements that influence its timekeeping, whereas the Gregorian calendar is primarily secular.