UTC
UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks and time. It is a high-precision atomic time standard that approximates mean solar time at the Prime Meridian (0° longitude) and serves as the basis for civil time worldwide. Unlike time zones, UTC does not observe daylight saving time and provides a consistent reference for global timekeeping.
Developers should learn and use UTC when building applications that handle time across multiple time zones, such as scheduling systems, international e-commerce platforms, or distributed databases, to avoid time-related bugs and ensure consistency. It is essential for logging, data synchronization, and API timestamps in global software to prevent ambiguity and errors from local time variations.