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"?