I answered yes, but for me rarity matters more than dates alone. But where I am more flexible is if it is, say late 2013 to 2019. I was on hiatus so it would be silly for me to try to match those dates, but I will edit, cancel, or procrastinate over a trade that asks for a 2009 rare/vr and they try to offer something after about 2017. That is unless the pet they are offering has ridiculous demand and can't be obtained any other way.
I also balk at trades if they try to pass an older common/uncommon for a newer rare/vr. If I really want the pets offered, I may go along with it or if I feel nice, but otherwise I hope for something of equal rarity.
Also I prefer true dates over rereleases. I make an individual decision per trade if I feel it is worth giving up my older true dates for relreleases. (this reasoning is mostly because of an organization issue over anything related to dates though.) I do try to separate pet categories so that timing in the month doesn't change the organization of the litter too much, except if two litters of the same group were offered that month. But when it comes to year differences, the rerelease sits in a different page than the rest of its litter and that makes it hard for me to find the pet later.