India's first Republic Day was celebrated on January 26, 1950. What day of the week was it?

Introduction / Context:
Historical day-of-week questions can be resolved by standard weekday algorithms (e.g., Zeller or doomsday) or trusted historical records. Here we determine the weekday for January 26, 1950, the first Republic Day of India.

Given Data / Assumptions:

• Target date: 26/01/1950.
• 1950 is a common year.

Concept / Approach:
Use a weekday algorithm for Gregorian dates. The doomsday for 1950 is Tuesday. Known doomsday anchors in 1950 include 4/4, 6/6, 8/8, 10/10, 12/12 on Tuesday; from these we move to January’s doomsday and then to the 26th.

Step-by-Step Solution (sketch):
For 1950, January’s doomsday falls on Tuesday shifted appropriately for a common year (Jan 31 is doomsday).Count from the January doomsday to Jan 26 to find the weekday.This yields Thursday for 26 January 1950.

Verification / Alternative check:
Authoritative date tables list 26 Jan 1950 as Thursday.

Why Other Options Are Wrong:
Monday, Tuesday, Friday do not match the computed weekday.

Common Pitfalls:
Confusing the pre- and post-1900 century offsets; using assumptions from a different calendar system.

Final Answer:
Thursday