current community chat blog Unix & Linux Unix & Linux Meta Sign up or log in to customize your list. more stack exchange communities Stack Exchange sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site Unix & Linux Questions Tags Users Badges Unanswered Ask Question Take the 2-minute tour × Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems.. It's 100% free, no registration required. Is `cal` broken? What happened in September 1752? up vote 10 down vote favorite 1 If you look at the output of cal 9 1752 you will see this strange output: September 1752 ...