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Dublin: 8 °C Thursday 23 January, 2020

Do Irish crisps always go out of date on a Saturday?

The theory exists, so we investigated.

wordpressss Source: Wordpress/IrishAmericanBreakfast

OF ALL THE quirky theories out there about food, one often pops up in every corner of the internet.

Do crisps always go out of date on a Saturday? It’s talked about a lot, especially in the UK:

yahooanswers Source: Yahoo

It even has its own Facebook community:

facecrisp Source: Facebook

FACT (apparently).

This has spread so much that it is indeed being passed off by people as a real thing:

So, went to a shop in Dublin and checked out the situation

It turns out that all brands made outside of Ireland went out of date on… a Saturday.

hulahoops2 Source: Twitter

It’s true. Multiple packets of Hula Hoops, Walkers, Ritz and Doritos all went out of date on different Saturdays later this year. That accounted for all the non-Irish crisps in the whole shop.


walkers Source: Twitter

But when checking the Irish crisps, the theory did not hold up at all


Not one packet of Tayto, Hunky Dorys, Chickatees, Snax, King and Chipsticks went out of date on a Saturday. In fact, they were a muddled collection of Tuesdays, Wednesdays and Thursdays. has contacted Largo – the Irish manufacturer of Tayto, King and Hunky Dorys to get to the bottom of why the international crisps go out of date on a Saturday and Irish ones don’t.

There are theories as to why the Saturday rule applies to crisps from across the water

1168 Source: BlogSpot

A forum on singletrackworld asked the question, and one poster seemed to have a legitimate-sounding answer to this quirky question:

Crisps get made in a factory that normally runs Monday to Friday. As the expiry date is so far in the future, crisps manufactured in the same week probably have the same date. And manufacturers would then push it back seven days every week. It’s the same as saying “Week ending”. awaits comment from Largo on this important issue. The people need answers.

By David Elkin. Originally published on 


More A definitive ranking of Irish crisps, from worst to best>

More 7 essential facts about best before dates on food>

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