Measuring Time, Distance, and Mass in the Arad Fortress, Early 6th Century BCE

While Biblical Hebrew literacy has been widely studied, numeracy—the cognitive ability to understand and manipulate numbers—remains a largely overlooked, underexplored domain. This article addresses this gap by examining the Arad Ostraca. These texts were produced in the early 6th century BCE and concern routine administrative operations, including issuing, receiving, and recording goods such as wine, bread, and grain. We pay close attention to timekeeping systems, including references to days, months, and a single regnal year and propose that some documents reflect a structured six-day supply cycle. It divides a 30-day month into five segments, establishing a calendrical system, which might have been influenced by Egyptian or Mesopotamian administrative traditions. Furthermore, the use of hieratic numerals in these otherwise Hebrew texts suggests a complex hybrid scribal culture. The paper argues that scribes and officials at Arad regularly engaged in quantification and planning, embedding numeracy into the syntax and lexicon of their written communications. However, because these inscriptions stem from a military and bureaucratic context, they likely represent a specialized linguistic register and do not necessarily testify to how Biblical Hebrew was used in other circles. The study thus contributes to our understanding of cognitive, logistic, and linguistic development in Iron Age Judah, while cautioning against generalizations beyond the administrative sphere.