Julian dates

Hi all,
I have problems with years of dates using "chron" package.
I don't understand why R by this istruction:

dates("01/02/29",out.format="d/m/year")

[1] 02/Jan/2029

dates("01/02/30",out.format="d/m/year")

[1] 02/Jan/1930

reads "29" as 2029
and "30" as 1930. How could I change to read "00" to "05" like 2000 to
2005 and "06" to "99" like 1906 to 1999 ?

I'm puzzled by the above:

dates("01/02/29",out.format="d/m/year")

[1] 02/Jan/2029

dates("01/02/30",out.format="d/m/year")

[1] 02/Jan/1930

so chron apparently acts as though time began at 01/01/1930.

However:

?chron

-->
 origin.: a vector specifying the date with respect to which Julian
          dates are computed.  Default is 'c(month = 1, day = 1,
          year = 1970)'

(which is the orthodox origin of time according to Unix) and, indeed,

origin(dates("01/02/29",out.format="d/m/year"))

month   day  year 
    1     1  1970 

So why does Massimiliano's example behave as though the origin
were 01/01/1930?

Best wishes,
Ted.


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Date: 28-Jan-04                                       Time: 16:38:37
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