The source that is being used currently is updated at five year intervals (next one is last day of 2019).

I thought about using JSON data, and/or some other mechanism to auto-update, but for now I just put a test in for current localtime year so that if I don't modify anything and I forget when the date hits, CPAN testers will barf an email to me as a reminder :)

In reply to Re^6: calculate magnetic declination by stevieb
in thread calculate magnetic declination by no_slogan

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