Has anyone noticed lately the influx of people that celebrate "one-month anniversaries", "six-month anniversaries", etc? Guess what --- there's no such thing. Anniversary is by the YEAR, not the month. After the first month, you could invent a crazy term like a "mensaversary" ("mensis" is Latin for "month"). And for six months, there's already a word - "semester" (from the Latin "semestris"). But this "anniversary" bit is a year - twelve months - 365 days (366 this year, and again in 2012) - no less.