Usually around seasonal times, bank holidays etc, people tend to buy more food products than they need even though the supermarkets will only be closed for 1-2 days.
wife - 'i must have that last tin of baked beans'
husband - 'its xmas darling when will we need baked beans? we dont want to be seen to be panic buying'
wife - 'the shops will be shut who knows?? grab it, its the last 1'
husband - argghhhhhhh!