[Zope-Coders] Replace Zope2 DateTime._parse() with Zope3's DateTimeParser

[Lennart Regebro]

From: "Andreas Jung" <andreas@andreas-jung.com>
>  - the DateTime constructor gets a new keyword argument "datefmt" with two
>    possible values "us" (default) and "european"
>
>  - "european" would force the parser to treat the date with day before
month
>    before year
>
>  - "us" would not change the default behaviour for compatibility reasons
>
>  - a new env variable DATETIME_FORMAT would allow to specify this
>    behaviour for the complete Zope instance
>
>  - the ZPUblishers notations for date types should be extended to:
>
>    "field:date" for US dates and
>
>    "field:date_european" for european dateformat (or a notation like
>    like "field:date:european" )

Could work. I assume that this would only be relevant for dates with dots
and slashes? Or do we also need the "field:date:international"?