beginDate
BeginDate is a term used across data modeling, software applications, and user interfaces to denote the starting point of a time interval. It typically marks the earliest date included in a range, such as the beginning of a contract, a project phase, a report period, or a data query window.
In practice, beginDate is usually stored as a date or timestamp. Common representations include ISO 8601 dates
BeginDate often appears alongside an endDate or duration to define a complete interval. In databases, APIs,
Validation and consistency considerations include ensuring beginDate is not after the corresponding endDate (when present), handling