Consider the following statements:
- I.Anadyr in Siberia and Nome in Alaska are a few kilometers from each other, but when people are waking up and getting set for breakfast in these cities, it would be different days.
- II.When it is Monday in Anadyr, it is Tuesday in Nome.
Which of the statements given above is/are correct?
Answer & explanation
Answer: (a) I only
Siberia lies just west of the International Date Line and Alaska just east of it, so Anadyr and Nome are on different calendar days. Going eastward across the line you subtract a day, so Monday in Anadyr is Sunday in Nome, not Tuesday.
- ✓ I The two cities lie on opposite sides of the International Date Line (about 180° longitude), so at the same moment their calendar dates differ; morning in Anadyr is still the previous day in Nome.
- ✗ II Moving from Siberia to Alaska is a crossing towards the east, where you subtract a day (Monday becomes Sunday). Nome is therefore a day behind Anadyr, never a day ahead.
Remember · Crossing the International Date Line travelling eastward, subtract a day; travelling westward, add a day.
📘 Read it in NCERT: Class 6 Exploring Society: India and Beyond, Ch 1 (practise this chapter)
Sources
- NCERT Class 6 · Exploring Society: India and Beyond, Chapter 1 “travelling eastward, you subtract a day (say, from Monday to Sunday); if you cross it travelling westward, you add a day (from Sunday to Monday).”
Question and answer: UPSC's official GS Paper I (2025, Series A) — paper ↗ · answer key ↗. Explanation: Minimalist IAS, checked 30 Sept 2026 (how we verify). ·