Calendar Conversions
John P. Pratt
CalCalc 2.0 Beta
19 Feb 2000
This page is for doing calendar conversions. So far, the only calendars included
are our modern Gregorian, the old Julian (or Old Style), the Mayan and the Julian Day
Number which astronomers use. These are all briefly described in the
F.A.Q. page. If you only see text on this page, chances are that
you do not have a java-enabled browser, which is required to do the conversions.
Roman.
To use the conversion, just enter the date desired in the appropriate calendar
box, and it will automatically be converted to the other calendars. Right now,
the only format for the Gregorian is either 22 Feb 1732 or Fri 22 Feb 1732.
It was always calculate the day, no matter what day of the week you enter. You
can enter in only part of the month name and omit spaces if you like, such as
22f1732. You MUST enter the entire year!! If you enter 14Oct97 you will get
A.D. 97. (Some of us do ancient history calculations!)
The LAST and NEXT buttons are intended for future use in
finding the next similar dates; right now, they just give the next day on
each calendar.
Mayan.
The Mayan calendar right now is only in English, but other languages will
be added in the next version (like Mayan and Aztec). You may enter a date in
one of four ways:
- Enter the complete long count.
- Enter the long count through the baktun, delete entries for rest of long count (but not
the periods!) and then enter short count.
- Enter the long count through the tun, and then enter the sacred count (day and dayname of 260-day count).
- Enter the long count through the tun, and then enter the day and month of 365-day year. For formatting
reasons, you must enter a day name. For example, to find out what day was 1 Pop (1 I) this year, enter:
0.12.19.4... .Reed 1.I which should give April 7, 1997, which was 0.12.19.4.1.3 13.Temple 1.I G5. using the
GMT correlation. By the way, I recommend the Pratt correlation, which can be selected from the pulldown
menu for the name of the calendar.
Other Calendars.
An original version of the Hebrew calendar called the Perpetual Hebrew Calendar (PHC) was just added.