Historical story

What day of the week was April 6 1830?

To determine the day of the week for April 6, 1830, you can use a formula or algorithm known as Zeller's Congruence. Here's how you can calculate it:

1. Convert the date to a number format:

- Extract the year (YY), month (MM), and day (DD) from the given date: YY = 30, MM = 04, DD = 06.

2. Apply Zeller's Congruence formula:

- H = (DD + (((MM + 1) * 26) / 10) + YY + (YY / 4) + (C / 4) - 2 * C) % 7

- Where C = the century (YY / 100).

3. Calculate the values:

- C = 18 (since YY = 30, so C = 30 / 100 = 0.3 = 0)

- H = (6 + ((4 + 1) * 26) / 10) + 30 + (30 / 4) + (0 / 4) - 2 * 0) % 7

- H = (6 + 13 + 30 + 7 - 0) % 7

- H = 56 % 7

- H = 1

4. Match the value of H with the corresponding day of the week:

- H = 0: Saturday

- H = 1: Sunday

- H = 2: Monday

- H = 3: Tuesday

- H = 4: Wednesday

- H = 5: Thursday

- H = 6: Friday

5. Therefore, April 6, 1830, fell on a Tuesday.