# What day of the week was on April 18, 1865?

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What day of the week was on April 18, 1865?
1. Sunday
2. Wednesday
3. Friday
4. Tuesday

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Correct Answer - Option 4 : Tuesday

When finding the reference date without reference date then formula will be:(Century code+ Year code + Month code + Date code)/7

Day Codes:

Sunday = 0

Monday = 1

Tuesday = 2

Wednesday = 3

Thrusday = 4

Friday = 5

Saturday = 6

Month Codes:

Jan = 1

Feb = 4

Mar = 4

Apr = 0

May = 2

Jun = 5

Jul = 0

Aug = 3

Sep = 6

Oct = 1

Nov = 4

Dec = 6

Century Codes:

1500 - 1599 ---> 0

1600 - 1699 ---> 6

1700 - 1799 ---> 4

1800 - 1899 ---> 2

1900 - 1999 ---> 0

2000 - 2099 ---> 6

2100 - 2199 ---> 4

2200 - 2299 ---> 2

2300 - 2399 ---> 0

Century code for 1865 is 2.

The year code can be find through (last 2 digit of year + (last 2 digit of year/4))/7.

(65 + 65/4)/7  = (65 + 1)/7 = 3

Here remainder will be 3 so year code will be 3

The code for April for non leap year: 0

The code for date will be date/7, here remainder will be 4 so code for date will be 4

Summing up,

(2 + 0 + 3 + 4) / 7 = 9/7

Here remainder is 2 which is code for Tuesday in below given list to on April 18, 1865 day will be Tuesday.

 Sunday Monday Tuesday Wednesday Thursday Friday Saturday 0 1 2 3 4 5 6

So, the day is Tuesday.