Which day is 10th October, 2027?

This question appeared in the 2021 exam held on **10th October 2021**, which was a **Sunday**.\n\n1. **Reference Point (Anchoring):** Using the 'Reference Date Anchoring' technique [15], we start with the known date: 10th October 2021 = Sunday.\n\n2. **Calculate the Gap:** We need to find the day for 10th October 2027. The gap is exactly 6 years.\n\n3. **Count Odd Days:** Using the 'Odd Days' concept [58], [60], we sum the extra days for each year:\n - 2021 to 2022: +1 (Ordinary)\n - 2022 to 2023: +1 (Ordinary)\n - 2023 to 2024: +2 (Leap Year - Feb 2024 is included) [35]\n - 2024 to 2025: +1 (Ordinary)\n - 2025 to 2026: +1 (Ordinary)\n - 2026 to 2027: +1 (Ordinary)\n\n4. **Apply Modulo 7:** Total Odd Days = $1 + 1 + 2 + 1 + 1 + 1 = 7$.\n As per 'Modulo 7 Arithmetic' [52], [56], $7 \\div 7$ leaves a remainder of **0**.\n\n5. **Conclusion:** A remainder of 0 means there is no shift in the day of the week. Since 10th Oct 2021 was Sunday, 10th Oct 2027 will also be **Sunday**.