🔍 Key Concepts

• Relationship between zone time (standard time) and daylight savings time • How shifting clocks forward by one hour relates to the reference meridian used for that time zone • Direction of increasing local mean time as you move east or west in longitude

💭 Think About

• If you move the reference meridian so that local time is one hour later, which direction must that meridian move on the globe? • Think about what happens to apparent solar time (sun time) as you travel east versus west: where does noon come earlier, and where does it come later? • How many degrees of longitude generally correspond to one hour of time difference, and how does that help you decide where the new meridian must lie?

✅ Before You Answer

• Verify that 1 hour of time ≈ 15° of longitude • Check which direction (east or west) gives a later local time at the same instant • Confirm whether daylight savings time makes the clock show a time that is ahead of or behind standard time