When crossing the International Date Line heading east, what happens to the calendar date?

When crossing the International Date Line heading east, what happens to the calendar date?

• A. Date becomes one day later
• B. Date becomes one day earlier
• C. No change
• D. Two days later

Answer: (A)

The date line is the boundary where calendar days switch. When you travel east across it, you enter a time zone that is a day ahead of where you were, so the calendar date increases by one. So, crossing east puts you on the next day (the date becomes one day later). For example, if you were on Sunday just west of the line, you’d be on Monday on the other side. The date doesn’t stay the same, nor does it jump by two days.

The date line is the boundary where calendar days switch. When you travel east across it, you enter a time zone that is a day ahead of where you were, so the calendar date increases by one. So, crossing east puts you on the next day (the date becomes one day later). For example, if you were on Sunday just west of the line, you’d be on Monday on the other side. The date doesn’t stay the same, nor does it jump by two days.