Traveling across the International Date Line is a remarkable experience that can leave you feeling like you've journeyed through time itself. This imaginary line on the Earth's surface marks where one day ends and the next begins. When you cross from west to east, you subtract a day from your calendar, effectively "losing" a day. Conversely, when you travel from east to west across the Date Line, you gain a day. The exact location of the International Date Line follows a zigzag path in the Pacific Ocean to accommodate various countries' time zones.