What is the halfway point at the 180th meridian known as?

The halfway point at the 180th meridian is known as the International Date Line. This imaginary line is significant in terms of global timekeeping and calendars, as it serves as the boundary for the date change—when one crosses the line, the date changes. The International Date Line is primarily located along the 180th meridian in the Pacific Ocean, with some deviations to accommodate political and geographical borders.

Understanding the significance of the International Date Line helps in grasping concepts related to time zones and how they affect global communication and travel. It illustrates the complexities of timekeeping across different regions of the world. In contrast, Greenwich Mean Time, the Tropic of Capricorn, and the Prime Meridian refer to different concepts: time standardization, geographic latitude related to the sun's position, and the 0-degree longitude line, respectively.