Fairly often, I see people measuring time in light years. They generally mean a pretty long stretch of time, too. Like an aeon.
This is not what a light year is. Instead, it is the distance that light travels in a year. Which is a pretty arbitrary, silly, and non-decimal way to do things, but I guess it helps with spectrometry and stuff. (Also, is this a year with February 29th, or not? (Please don't answer that; it was rhetorical.))
Despite having the word "year" in it, therefore, it is not a measurement of time.
The same thing applies to parsec, which, despite being an abbreviation of "parallax second," is not a measurement of time either, Han Solo.
Just...could people not use words they don't know in a failed attempt to sound educated and science-savvy? Then I wouldn't have to judge them.