In Czech, dates
are written in the day-month-year format. The month name is in genitive if functioning as an adverbial (i.e., answering the question "when?",
- default long format). When the date performs the nominal function (name of a day, answering the question "which day?"), nominative is used, as indicated under Additional Long Format 1. Such
use is however very rare and normally never applies to software.
The period after a number is always followed by a non-breaking
space. (Required, not optional.) The year always consists of four digits.
No leading zeros
Day and month names do not take an initial capital in Czech.
If a date format includes a day name (or
abbreviation thereof), there is a comma between the day name and the number: čtvrtek, 17. března 2011
The use of Roman numerals to indicate months is obsolete and considered archaic but acceptable in Czech. It should be used
ONLY as a third alternative
to the Long and Short formats,
where the US software would offer abbreviated month names (such as Jan, Oct, etc.),
and ONLY if there is no other possibility
to use one of the other two formats. Abbreviating month names in Czech is not