The date field type specifier can be used to declare dates and times. The synopsis is:
%typedef: type_name date
There are many permitted date formats, described in detail later in this manual (see Date input formats). Of particular note are the following:
TZenvironment variables are ignored. If you wish, for example, to specify a time which must be interpreted as UTC, you must explicitly append the time zone correction: e.g. ‘2001-1-10 12:09Z’.