In Canada, the official method for today is 11/10/2022, except if you are a programmer, or from Quebec, where 2022-10-11 (ISO style) is more common.

But I sometimes get cheques (checks) from the USA which for today would be 10/11/2022. So here at least, we see cheques with all 3 formats. Most Canadians no longer use cheques - now I see why.

US chains (Walmart) often print their receipts in the US format, but Canadian businesses generally use Canadian or ISO format. Its a huge headache if you have a small business and count your pennies on your receipts at tax time - especially if your corp year end is not Dec 31st. 'Was this receipt for last tax year or this tax year'. 

I personally convinced Ottawa International Airport to convert their displays to ISO format. Their original display software was setup with the USA format.


----- Original Message -----
From: Fred Gleason via tz [mailto:tz@iana.org]
To: "Tz Database IANA" <tz@iana.org>
Sent: Tue, 11 Oct 2022 11:59:10 -0400
Subject: Re: [tz] What's your idea of a perfect date?

On Oct 11, 2022, at 11:40, Brooks Harris via tz <tz@iana.org> wrote:

I once had a check from a UK client (wait, I guess it must have been a cheque?) with a date like "19-7-2015". My American bank would not accept it because the date made no sense to them. It took phone calls and a visit to the bank to sort it out. :-)
Even weirder (from a strictly parochial American POV) is a convention I’ve seen in German documents from the the early/mid-twentieth century (and perhaps today?), where the year would be expressed in Roman numerals. Thus: s/19-7-1932/19-7-XXXII/.
 
Cheers!
 
 
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