What is the proper way to ask for date format preference in a program?


I have a simple program that allows users to choose what date format they want
to see.

In English I ask something like this:

[code]

    Day/Month/Year   or   Month/Day/Year
    
[/code]

Abbreviated would be this:

[code]

    DD/MM/YYYY   or MM/DD/YYYY
    
[/code]

How would you present this question in Japanese? Is it acceptable to use the
Roman letter abbreviation or is there a better way?

Similarly, 12 or 24 hour time preference. Should I say `十二` or `二十四` versus
English numerals?




Practically speaking, the only format used and understood in Japan is
"year/month/day" (e.g., `2018/6/21` or `18/06/21`). So you don't have to let
users choose. "British style" (`21/6/2018`) and "American style" (`6/21/2018`)
are both out of the question, especially when you target only at older
Japanese people who are unlikely to understand easy English words. But if you
really want to make it configurable, a reasonable choice will look like
`年/月/日` or `日/月/年`, where the kanji 年 means "year", 月 means "month" and 日
means "day".

If you really want to allow users to choose between "15:00" and "3:00 PM", the
word for "24-hour system" is 24時間制, and "12-hour system" is 12時間制. Rest
assured that everyone understands `AM` and `PM`. Numbers themselves should be
Arabic numerals, not kanji.




Practically speaking, the only format used and understood in Japan is
"year/month/day" (e.g., `2018/6/21` or `18/06/21`). So you don't have to let
users choose. "British style" (`21/6/2018`) and "American style" (`6/21/2018`)
are both out of the question, especially when you target only at older
Japanese people who are unlikely to understand easy English words. But if you
really want to make it configurable, a reasonable choice will look like
`年/月/日` or `日/月/年`, where the kanji 年 means "year", 月 means "month" and 日
means "day".

If you really want to allow users to choose between "15:00" and "3:00 PM", the
word for "24-hour system" is 24時間制, and "12-hour system" is 12時間制. Rest
assured that everyone understands `AM` and `PM`. Numbers themselves should be
Arabic numerals, not kanji.

