India attained independence on August 15, 1947. Determine the day of the week on that date.

Introduction / Context:
Day-of-week problems can be solved via known references, leap-year adjustments, or established calendars. August 15, 1947 is a well-known historical date in India (Independence Day).

Given Data / Assumptions:

• Date: 15-08-1947.
• Gregorian calendar conventions.

Concept / Approach:
Use a standard day-of-week algorithm (e.g., Zeller-type congruence) or trusted reference. Adjust for leap years and month codes to map the date to a weekday.

Step-by-Step Solution (sketch):
Apply a known algorithm with 1900s century code and year offset 47.Account for leap years from 1901 to 1947 (including 1904…1944).Compute cumulative offset modulo 7 → Friday.

Verification / Alternative check:
Historical records and reliable calendars list 15 August 1947 as a Friday in India (IST).

Why Other Options Are Wrong:
Thursday/Sunday/Monday do not align with verified historical weekday mapping for this date.

Common Pitfalls:
Miscalculating leap-year counts or month codes; mixing Julian vs. Gregorian is irrelevant here (India uses Gregorian).

Final Answer:
Friday