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Every 7 days the weekday comes back, so only the left-over days matter. Each month has a code (the days before it, minus whole weeks). Start from the weekday of 1 January, add the month code and the date, and throw away whole weeks.
✓ You passed this lesson’s test.
Month code + date — “only the days left over after whole weeks move the weekday”
Use it for: Planning birthdays, holidays and exam dates, and calendar puzzles in Olympiads.
Check: 1 January to 26 March is 31 + 28 + 25 = 84 days = exactly 12 weeks, so it is a Friday too ✓
Work it out in your head or on paper, type the answer and press Check. Stuck? Press “Show me how”.
Right: 0 · Tried: 0
20 questions. Check each answer, then go to the next one. Get 16 or more right to pass.
🏅 Sign in with Google to earn the 📅 Weekday Wizard badge when you pass — and a certificate when you finish all 9 lessons of Part 4 · Bigger numbers, fractions and the calendar. You can still take the test without signing in.
Why does it work? When should you use it? Ask in English, मराठी or हिंदी.
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