Unix Timestamp Converter

Convert between human-readable dates and Unix timestamps. Unix time (also called epoch time or POSIX time) counts the number of seconds since January 1, 1970 at midnight UTC—the "Unix epoch." This system is used extensively in programming, databases, APIs, and system logs because it provides a timezone-independent, sortable, and easily calculable time representation. Current Unix timestamp increments by 1 each second. JavaScript uses millisecond timestamps (multiply by 1000). The Y2038 problem affects 32-bit systems that store timestamps as signed 32-bit integers, which overflow on January 19, 2038—similar to Y2K but for Unix-based systems.