Thanks, the link esr provides in his website (https://www.catb.org/~esr/faqs/time-programming/index.html https://www.catb.org/~esr/faqs/time-programming/index.h

Thanks, the link esr provides in his website (https://www.catb.org/~esr/faqs/time-programming/index.html https://www.catb.org/~esr/faqs/time-programming/index.html) leads to a 404