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Catend Study pointer

Tables for the Weekday
of any date between 1809-2100

with an example

Typo in third sentence corrected 18 April 2011
Choose the year, and look at Table 1. Make a note of the J number in the last column. If the year is a leap year (marked L), look for the date in Table 3. Otherwise look for the date in Table 2. Make a note of the D number in the last column.

The weekdays are numbered as:

1 or 8: Sunday, _ 2 or 9: Monday,_ 3 or 10: Tuesday, _ 4 or 11: Wednesday, _ 5 or 12: Thursday, _ 6 or 13: Friday, _ 7: Saturday

Then the desired weekday has the number J + D

Table 1. Years
years

Table 2. Dates in ordinary years
ordinary years

Table 3. Dates in leap years
Dates in leap years

Example
Diary for 1912
Part of a 1912 Diary

For 1912, Table 1 gives J = 1 and the L means it is a leap year. Then Table 3 for 26 September gives D = 4. Then J + D = 5, indicating Thursday, as in the picture.

Leap years
Century years such as 1900 and 2100 are not leap years; but a year such as 2000 is a leap year because it is exactly divisible by 400.

Checks have been made but this page comes with no warranty. I am grateful to Prof.dr.ir. Michel M.J. Decré for alerting me to a typo.

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Copyright (C) Anthony P. Stone 2014. This material may be freely used, provided the author is acknowledged.

Last updated: 18 June 2014