Date's are incorrect. Did Arvelie change?

[gennyble]

In lib.js it seems that you set the day to +01 if it's December 31st, and +02 is used on February 29th. I'm pretty sure this is incorrect, but I am not sure what is correct.
On the XXIIVV page for arvelie, it gives two examples for these times. 14C01 2009-01-29 for February 29th as a leap day, and 03+00 2010-12-31 to show the what end-of-year would look like when it's not a leap year.
I found arvelie a bit confusing until I just tried to explain this (thanks rubber duck debugging!) and I believe Z+00 is the regular, non leap year month-day, and Z+01 would be the leap-year month-day. 365 / 14 is 26 with 1 remainder, so a regular year gets Z00 on the 364th day, and Z+00 to deal with that one extra. Z+01 adds that extra day which is kind of beautiful.

Sorry if I explained this too much, I'm making a CLI arvelie, too, and this helped me figure it out.

[gennyble]

I pulled down oscean and found arvelie.c on May 17th, 2020. It seems that the examples on the XXIIVV arvelie page are wrong, because the two do not match. Closing, sorry.

[gennyble]

No, wait. Yikes. I'm sorry for all the notifications, but I don't trust that C file.

If we look at the XXIIVV tracker page, we never see 14 in the day position. Further, with arvelie.c, we get A01 on Jan 1st of a year, but there are a significant number of A00's on the tracker page. This leads me to believe that my first comment is correct, and I'll reopen the issue. I should have thought about it more before closing, clearly.

If I were to guess, the first Arvelie was 1-based, but it's now 0-based.

EDIT:
I might be a little blind. It's funny because I'm wearing glasses. Arvelie's page says this:

The arvelie date 13A05, is equivalent to January 6th of the 14th year.

[octref]

XXIIVV/oscean#64 (comment)

hi @neauoire, did you end up updating the date to be 0 based?

[neauoire]

A yes, as of this year Arvelie is now zero based. I haven't updated the js version, it's possible that the examples on XXIIVV are incorrect now. I'll double check :)