Take the 2-minute tour ×  Many condiments such as katchup,
mayonnaise and mustard (where I live at least) seem to love
rounding all of their expiry dates to "60 days after opened".
Thing is, I never see any difference after the date, at least
with mustard. It's easy to consume katchup or mayo under a
couple of months, but I only like mustard for very few things,
so I have some black mustard from ~3-4 months that tastes just
as good.  What is weird to me is that they round the expiry
dates. Are they just lazy and think "nah, nobody takes more than
two months and it should last that long"?  share|improve this
question By the way I would expect katchup to last much less
than mustard, but it's rare getting it to last one month anyway
:) –  Camilo Martin Feb 7 '12 at 1:43 You seem to be using
"rounded" to mean "too soon". You're actually asking why the
dates are shorter than the dates you think are safe, right? – 
Jefromi Feb 7 '12 at 4:05 Also, surely this is a duplicate.
Maybe we can just add a tiny bit to the