30 Days Hath September

Thirty days hath September,
April, June, and November.
All the rest have thirty-one,
Excepting February alone,
And that has twenty-eight days clear,
And twenty-nine in each leap year.

For other versions and the "knuckles" method for remembering month lengths, visit this Wikipedia article.



Download a printable copy of the 10,000-Year Calendar in the format that you prefer:

(Microsoft Excel Version)

(Lotus 1-2-3 Version)

(Adobe Acrobat Version)

(Czech language)


New 100-Year Perpetual Calendar! Click Here!
(Make your left and right margins 0 (zero) inches!!!)

Spreadsheet and Adobe Acrobat versions converted by amateur genealogist John A. Blair.

Czech language version translated by

More Charts

smal1001 100-Year Calendar

Use Up/Down scroll buttons to specify the 100-year span of the calendar, and then print! You will easily be able to view the monthly calendar for any year & month for 100 years - without a computer!


200-Year Calendar (xls)

Created as an Excel spreadsheet, this calendar has fourteen whole-year calendars A through N and a chart showing which years 1882 through 2101 go to which letter. The print is small yet readable printed 8.5 x 11, but this was really made to print as a poster. If you don't have access to a printer that will print poster size you may want to take the .xls file to your local print shop.  We now have a version with all black text!


Percentage Off Chart (pdf)

Not calendar-related, but use this chart to quickly estimate the new price if something is "x percent off". This is a PDF file.

Find Years Where...

Show years where:

lands on a

Frequently Asked Questions

Please do a search using the searchbox in the upper right-hand corner of any page. If it is not listed, then we do not carry the item.
No. Year 1 B.C.E. was immediately followed by year 1 C.E.
When the Julian calendar converted to Gregorian, leap years were skipped on years ending with 00 except for those that are divisible by 400. Generally, this site will produce a Julian calendar before 1752 and a Gregorian Calendar after that. Our Day of Week Calculator will show the day of week for a given date for multiple calendars systems simultaneously - and list the countries that used each system at the given date.
The millennium began January 1st, 2001. Because there was no Year Zero, the first millennium was from January 1st, 1 (C.E.) through December 31, 1000 (C.E.). So the second millennium started January 1st, 1001, etc.
No, that is not true. Leap years are skipped in years that are evenly divisible by 100, except for those that are divisible by 400. Since 2000 is evenly divisible by 400, the leap year is not skipped.
No, obviously this did not happen. Due to an error on the show "Hollywood Squares" in the mid-1970's many people were caused to believe that there would be a February 30 in the year 2000, but it was a mistake.
Yes! By popular demand, we have created a utility that will tell you what years have the same day-of-week/date relationship for a year that you indicate from 1800-2100. This utility is located here.
Of course! We make it easy by providing the html that you need to link to us. After you link to us, contact us and let us know!