In Hong Kong the official standard is to use the UK style for dates (e.g. Christmas Day is 25/12/05), but American dates (e.g. 12/25/05) are widely used, and of course dates in Chinese are written in year/month/date format (Y 2005 M 12 D 25), so the short form of this (05/12/25) is also used sometimes.
It goes without saying that this can cause confusion, all the more so since the Y2K problem came and went without anyone getting stuck in a lift or finding all the traffic lights set to red.
For example, the sell-by dates on food products might employ any of the above formats, and often the manufacturers can’t be bothered to offer any explanation. I guess that in the UK it would be illegal not to use the dd/mm/yy format, but we don’t have of those silly regulations here, thanks very much. Fortunately it is often obvious which one is being used, but not always – in a Hong Kong supermarket it is entirely possible that a product will still be on the shelves weeks after the sell-by date, so common sense doesn’t always help as much as it should.
UK Supermarkets mark-down the price of products on their "sell-by" date, though very often the item will be fine to eat for the next couple of days (or longer) – and they usually have a later "use by" date just to highlight this point. In Hong Kong, the miserable supermarkets will carry on selling products up to the "use by" date (if one is specified). Equally, many products don’t have a "sell by" date at all (or at least not one that the consumer can understand), in which case their rule seems to be to leave them on the shelves until they rot away.
I am being a little unfair, because the supermarkets do sometimes notice that products have reached their expiry date and reduce the price. And amazingly, the confusion about dates sometimes works in the customer’s favour (a rarity in HK supermarkets) and they reduce the price because they confuse the 6th of May with 5th of June (or whatever). Only seen it once, but it made me smile!
Incidentally, I recently discovered that cranberries have a shelf-life of two years, so that rather tatty bag that has been sitting on the shelf in my local Park’n’Shop for the last six months is apparently just fine to eat. The Economist has more, er, useful information:
The cranberry is one of only three fruits native to North America, growing wild from Maine to North Carolina.
If you want to know the identity of the other two, you’ll have to read the article.