If you're cracking open a brew this May long weekend, why not check how fresh it is?

That's the challenge we gave Brad Goddard, who considers himself pretty savvy when it comes to the date codes on beer. He has worked in the beer industry for more than a decade with Big Rock Brewery and Steam Whistle Brewing.

Out of six random beers packaged in a mystery bag purchased at a beer store, his job was to figure out the date stamped on the bottles and cans.

He could only figure out half of them.

It should be simple. Most food and drink items at grocery stores have best-before dates that can be found and understood relatively easily.

The product can degrade a little bit. … When it goes out the door it is in peak flavour and peak condition — Ken Woods, Black Oak Brewing

But beer? Not so much. A lager could be nice and crisp as if it was picked up straight from the brewery or it could be getting stale having sat in a warehouse and on a store shelf for a few years. You might be able to taste a difference, but good luck finding out its age before you buy the beer and take it home.

All beers carry a date code, but there is no consensus on how to print the date. As well, the code isn't always easy to understand, such as D01C621355 (likely produced on April 1, 2016 at 1:55 p.m.).

Freshness a hallmark of craft beer

Traditionally, beer drinkers haven't cared too much about how old their beer is because most multinational beer companies pasteurize and filter their product to ensure the taste lasts for a long time.

Customers are starting to be a bit pickier with the rise of craft brewing, in which beer often is not pasteurized and is filtered only lightly, if at all.

These beers don't have as long a shelf life before the taste starts to change, so some craft brewers are trying to make sure the beer is always fresh. It's important in a ultra-competitive industry where customers have hundreds of beers to choose from.

In the craft segment, freshness is a hallmark, and date coding is the only way consumers can gauge the age.

"It's like a chef making a really good meal," said Ken Woods, owner of Black Oak Brewing in Etobicoke, a suburb of Toronto. "When do you want to eat that meal? A couple days from now, a couple months from now or as soon as it's made?"

6 months or 200 days

Pilseners are most at risk of flavour change if they are not fresh.

Woods said beer produced at Black Oak should ideally be consumed within six months or about 200 days after it was produced.

If Black Oak Brewing beer isn't sold within about six months, it is often returned and made into other products like jam or soap. (Instagram/@blackoakbrewing) "The product can degrade a little bit. It depends if it's in a warm area, a cold area, has it been jiggled around getting from here to where you are?" said Woods. "When it goes out the door, it is in peak flavour and peak condition."

The brewery provides a clear label with the production date. Woods wants that to be the industry standard, instead of the various codes that are now allowed.

Woods is a board member of Ontario Craft Brewers, an association that encourages its members to provide an easy-to-read date on beer. The group also is lobbying the Liquor Control Board of Ontario to simplify beer date codes.

The issue is so important that Black Oak will take back beer that hasn't sold quickly enough.

"The Beer Store is usually pretty good at maintaining code dates. So if there is any old code that comes back we'll turn it into soap or beer jelly," said Woods.

Why so confusing?

The reason behind the often confusing date codes is not clear, although there are theories.

Goddard, who took our challenge of trying to understand the codes, thinks the big industry players have a lot to do with it.

These main multinationals have set the tone and intentionally made it difficult for consumers to read because it's not a message they want — Brad Goddard , Big Rock Brewery

"Freshness has never been a message for Big Beer, or it hasn't for decades as they've created efficiencies by consolidating production lines. Now it's about efficiency and maximizing shareholder return," said Goddard.

"These main multinationals have set the tone and intentionally made it difficult for consumers to read because it's not a message they want."

While many craft brewers want dates on beer bottles and cans to be clearer, there are some challenges.

There is debate about whether to use a best-before date or a production date.

In addition, brewers will have to expect more beer to be returned by stores, once it's easier for customers to find out how long a 12-pack has sat collecting dust.

The date codes on beer are not always the easiest to understand. (Kyle Bakx/CBC) "I do the same thing with beer that people do with milk. I reach in, dig and pull the freshest stuff out," said Goddard. "They have a shelf life, they need to be rotated in and out."

Who makes the change?

Domestic and international beer companies have to follow the same rules if they want to sell their product in Canada. The packaging and labels must be in both official languages, show the volume in metric units and list the alcohol percentage.

A standard date code could be added to the list.

"The government's job is to put the consumer first," said Goddard. "It's an easy ask for them to require it."

In Alberta, the provincial liquor authority does not see the need to mandate a requirement.

"For any discussions on this subject, the AGLC (Alberta Gaming and Liquor Commission) would work with the broader industry, other liquor jurisdictions as well as the federal government (Health Canada, CFIA) to maintain consistency nationally, and more importantly not to be introducing an additional layer of requirements at the provincial level," said AGLC spokeswoman Tatjana Laskovic in a statement.

In the meantime, more craft brewers are voluntarily switching to easy-to-read best-before or production dates.

"Customers will vote with their throats," said Woods. "If they think this is a bad beer and they have a bad experience, they may not go back to that brand. We always want it to be fresh and good."

Neither Labatt, Molson nor the Beer Canada trade association would provide their position on the topic.