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Question
Run the whole method on one date: what day was 6 June 1944 (D-Day)?
Answer
Tuesday.
- Century anchor (1900s) = Wednesday (3).
- Year's doomsday for 44: q = 3, r = 8, s = 2 → 3 + 3 + 8 + 2 = 16, mod 7 = 2 = Tuesday.
- The date: June's doomsday date is 6/6, which is the doomsday. 6 June = 6/6 → Tuesday.
Check: D-Day, 6 June 1944, was a Tuesday. ✓ Three small steps — anchor, year, date — and you're done.
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Question
Another full run: what day was 15 August 2001?
Answer
Wednesday.
- Anchor (2000s) = Tuesday (2).
- Year 01: q = 0, r = 1, s = 0 → 2 + 0 + 1 + 0 = 3 = Wednesday (year's doomsday).
- The date: August's doomsday is 8/8 (Wednesday). 15 − 8 = 7, 7 mod 7 = 0 → 15 August is also Wednesday.
Check: 15 August 2001 was a Wednesday. ✓ Notice step 3 stays tiny because you count from the month's own doomsday date, never from the 1st.
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