🔍 Key Concepts

• International Date Line (IDL) near the 180th meridian and how crossing it affects the date, not the clock time • Difference between local time of day and calendar date when crossing the IDL • Direction of travel: what happens to the date when you cross the IDL westward vs eastward

💭 Think About

• If it is 1000 on 6 July just before crossing the 180th meridian going west, what would the time AND date be just after crossing? • Does the clock (hours and minutes) change at the IDL, or only the date? Think carefully about what "local time" means in this question. • When going westward across the IDL, do you move the date forward one day or back one day?

✅ Before You Answer

• Be clear whether you are changing the date only or both time and date when crossing the 180th meridian. • Confirm what happens to the calendar day when traveling westward across the International Date Line. • Check that your chosen option keeps the 1000 time consistent if you decide that only the date changes.