Time_t

`time_t` is a data type used in programming to represent a specific point in time, typically the number of seconds elapsed since January 1, 1970, at midnight UTC. This standard starting point is known as the Unix epoch. By using `time_t`, programs can store, manipulate, and calculate dates and times efficiently. It allows for operations like measuring durations, setting alarms, or converting timestamps into human-readable formats. Essentially, `time_t` provides a consistent way for computers to track and work with points in time across different systems and applications.