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4.13: How do I find the current century or millennium?

Use the following simple functions:

sub get_century {
return int((((localtime(shift || time))[5] + 1999))/100);

sub get_millennium {
return 1+int((((localtime(shift || time))[5] + 1899))/1000);

On some systems, the "POSIX" module's "strftime()" function has been
extended in a non-standard way to use a %C format, which they sometimes
claim is the "century". It isn't, because on most such systems, this is
only the first two digits of the four-digit year, and thus cannot be
used to reliably determine the current century or millennium.


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