To find the week day on 2nd April, 1994, calculate odd days
[... After 1900, No. of full year = 93]
x = 93
[... There are 23 leap years between 1900 and 1994]
y = 23
[... 1900 = (multiple years of 400) + 300]
z = 1
[Jan. 31 + Feb. 28 + March 31 + April 2]
No. of days = 92
x + y + z = 209
Total = 209
On dividing 209 by 7, remainder = 6
∴ 2nd April, 1994, Sixth day after Sunday = Saturday
Hence, inApril 1994 Sunday fall on 3, 10, 17, 24 dates.