You probably won't get one that was made last week, but you should expect it to be within the last several months.
When your tires hit fives year in age, it's time to think about replacing them.
Some fear it would be mistaken for a best-before-date (potentially losing some sales or causing frustration), others don’t want you to compare different batches (after all one of the purposes of a solera is to keep a constant profile).
This resistance towards date indications are overcome by bottling codes.
It gives the date that the tire was manufactured but it doesn't just spell it out right.
You have to know what to look for and how to read it. It's on one side of the tire, so you may have to crawl underneath to look at the inside of your tires.