Help – Perpetual Calendar (obsolete: Version 1 only)

(This Page relates to Version 1 of the Perpetual Calendar.  Version 2 is now available, which provides its own in-line Help and Info that replaces this page.)

This Page provides Help and Information for the Perpetual Calendar that looks similar to the following:

, (year in 3 parts)

What is a Perpetual Calendar?

The name Perpetual Calendar refers to the ability to see a calendar for any date in the past, present or future. Because they are always used to figure out the day of the week for a particular date, this version lets you enter a date and have the day of the week displayed for you, without the need to read a traditional calendar.

How to Display the Day of the Week for a Date?

To the right of the Display Day of Week button, click on the down arrow in each of the five boxes and select from the lists displayed by clicking on:

  1. the Month
  2. the Day of the Month
  3. the first one or two digits of the year, for example, A.D. 20 for this year, [currentyear]?
  4. the next digit of the year, frequently called tens
  5. the last digit of the year

Then click on the Display Day of Week button.

You should now see a message above the Perpetual Calendar similar to the following:

  • February 9, 1962 A.D. is a Friday

You may also see the message “Error:  date specified does not exist.” typically when specifying a Day of the Month that does not exist, such as April 31, as April only has 30 days.

Feel free to try it above.

A.D. and B.C.

The current year, [currentyear]?, is more correctly known as “[currentyear]? A.D.” to differentiate it from the year more than 4000 years ago with the same number, [currentyear]? B.C.  For more information, on A.D. and B.C., click here for the Wikipedia article on the subject.

Because this Perpetual Calendar can go nearly 7000 years into the past or future, all dates are shown as A.D. or B.C.

About this Perpetual Calendar

This Perpetual Calendar was written by a retired computer programmer who began writing programs in 1971, and is available for free to any web site that wishes to use it.  It was designed for WordPress, a popular piece of software used to create web sites.

Click on the menu bar at the top of this page for more details.