Zero is a number representing an empty quantity. It serves as the additive identity, meaning adding it to any number leaves the number unchanged. Multiplying any number by zero always results in zero. Division by zero is undefined in arithmetic. Zero is a fundamental concept in mathematics and is essential for various calculations and algebraic structures.
In January 1904, the Classic Mac OS epoch and Palm OS epoch began at midnight before the first of January.
In 1907, the number zero was commonly pronounced as "oh" when reading out years, as in "nineteen oh seven".
In January 1970, the Unix epoch began at midnight before the first of January.
In 2017, researchers at the Bodleian Library reported radiocarbon dating results for samples from the Bakhshali manuscript, suggesting the oldest fragments might date back to AD 224–383, potentially representing South Asia's oldest recorded use of a zero symbol, while other fragments dated later.