The -3 arg is not available on OS X. Odd, since it's been in BSD Unix since fore... | Hacker News

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		xrt on Sept 10, 2013 \| parent \| context \| favorite \| on: Unix Commands I Wish I’d Discovered Years Earlier The -3 arg is not available on OS X. Odd, since it's been in BSD Unix since forever. http://www.freebsd.org/cgi/man.cgi?query=cal

clarry on Sept 10, 2013 [–]

It's hardly ubiquitous.

NetBSD has had it for 11 years. FreeBSD has had it for three years and six months. DragonFly doesn't have it, OpenBSD doesn't have it...

http://cvsweb.netbsd.org/bsdweb.cgi/src/usr.bin/cal/cal.c?re... http://svnweb.freebsd.org/base?view=revision&revision=204697

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