It's a duration. It does not have a start/end date. So you cannot possibly know
if you're in a leap year.
I've searched a bit, but I cannot find the spec where it says how to perform
the duration normalization, but the code in Duration::normalize() assumes a
year has 60 * 60 * 24 * 30 * 12 seconds.
Your team Zorba Coders is requested to review the proposed merge of
lp:~nbrinza/zorba/bugs2 into lp:zorba.
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