Z:gnu-www-ja-gpl-howto--a86242-The copyright notice should in/en

The copyright notice should include the year in which you finished preparing the release (so if you finished it in 1998 but didn't post it until 1999, use 1998). You should add the proper year for each release; for example, &ldquo;Copyright 1998, 1999 Terry Jones&rdquo; if some versions were finished in 1998 and some were finished in 1999. If several people helped write the code, use all their names.