Anno Mundi

Latin for "in the year of the world," abbreviated AM is a calendar system that counts years from a calculated date of creation. Primarily used in Jewish and historical Christian traditions, it provides a chronological tally since the beginning of the world according to scripture.

Jewish Calendar (Hebrew): The most common usage today, setting creation at 3761 BCE (e.g., the year 5786 AM began in 2025).
Byzantine System: Historically used in the Greek Orthodox tradition, this placed creation on Sept 1, 5509 BCE.
Usage: Used to calculate dates in religious or historical contexts to indicate how many years have passed since the "beginning".

Key Differences

vs. BC/AD: Anno Mundi begins at a calculated creation, whereas BC/AD (or BCE/CE) centers on the birth of Jesus.
Calculation: Different traditions created distinct AM systems, causing the same event to have multiple AM years depending on the model.