Only the top of this January 2001 calendar page survives. Using it, find the day of the week on 26 January 1950, India's first Republic Day.

26 January 2001 is a Friday (1 January is a Monday, and 25 days later is Friday). From 26 Jan 1950 to 26 Jan 2001 is 51 years with 13 leap days (1952–2000), i.e. $51+13=64\equiv 1$ odd day. Going back 1 day from Friday gives Thursday.