(Science: day of the week)

Question

Zeller’s congruence is an algorithm developed by Christian Zeller to calculate the day of the week. The formula is

h=(q +26(m+1)//10+k+k//4+j//4+5j)%7

where

- h is the day of the week (0: Saturday, 1: Sunday, 2: Monday, 3: Tuesday, 4: Wednesday, 5: Thursday, 6: Friday).

- q is the day of the month.

- m is the month (3: March, 4: April, ..., 12: December). January and February are counted as months 13 and 14 of the previous year.

- j is year//100.

- k is the year of the century (i.e., year % 100).

Answer 1

As David M mentioned, it's not clear what the question is.

However, here's a link that provides additional info and an implementation ...

https://medium.com/explorations-in-python/calculating-the-day-of-the-week-with-zellers-congruence-in-python-8009001dd84e