OffsetDateTime is a class in the Java programming language that represents a date and time with an offset from UTC (Coordinated Universal Time). It combines the date and time components with a time zone offset, allowing for precise representation of moments in time across different regions. This class is part of the java.time package, introduced in Java 8, and is useful for applications that require handling of time zones and offsets. It provides methods for creating, manipulating, and formatting date-time values, making it easier to work with time-related data in a consistent manner.