Time::Local is buggy when you use it to do time/date arithmetic. The maintainer refused to apply a simple harmless fix for the bug. I think this line was added to the docs instead:

If you supply data which is not valid (month 27, second 1,000) the results will be unpredictable (so don't do that).

He told me that Time::Local isn't to be used for date/time arithmetic. _nocheck doesn't relax the need for valid inputs. The fourth argument needs to be a valid day for the specified month and year. If it's not allowed with _nocheck, it's not allowed without.

In reply to Re^2: weekday from dayofyear by ikegami
in thread weekday from dayofyear by slloyd

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