A Time Zone Database is a collection of data that provides information about the different time zones around the world. It includes details such as the standard time offset from Coordinated Universal Time (UTC), daylight saving time rules, and historical changes in time zones. This database is essential for software applications, scheduling, and global communication. The most widely used Time Zone Database is the IANA Time Zone Database, maintained by the Internet Assigned Numbers Authority. It is regularly updated to reflect changes in time zone policies and is utilized by various programming languages and systems, ensuring accurate timekeeping across different regions.