IMNAIPL, but, now, my take on the date in a Copyright notice is to do something like:

# First Edition: Copyright 2014, John Perl Coder
# Revised 2017:  Copyright 2017, John Perl Coder

[download]

I have seen very similar notices in books I have read, so may be a reasonable way to cover potential loopholes.

Again, consult a Copyright lawyer

In reply to Re: Copyright issues: year range, module vs distribution, rename/reorganization by RonW
in thread Copyright issues: year range, module vs distribution, rename/reorganization by perlancar

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