I hope that I am able to ask this question in a way so that you will
understand what I mean

It is my understanding that if you keep wines long term - there will be
certain times (years?) that it will taste better than others. (So if
you keep a wine for 10 years it will taste different than if you waited
15 to open it) I could be wrong :/

I am looking for somewhere that there is perhaps a chart showing
vintage/area/best years to drink or something like that.

The reason I ask....

A few years ago (back when money was much tighter than it is now) I
bought my husband an "expensive" (relative to what we could normally
afford) bottle of wine - He has saved it. My concern is, how long is
too long to wait to open it - is there a way to know when we should
drink it??

In case it is important it is a bottle of

Caymus 1995 Cabernet

Thank you,

Roberta (in VA)