Adjusts an xs:date value to a specific timezone, or to no timezone at all;
the result is the date in the target timezone that contains the starting instant of the
supplied date.
fn:adjust-date-to-timezone( $arg as xs:date?xs:date?fn:adjust-date-to-timezone( $arg as xs:date?,$timezone as xs:dayTimeDuration?xs:date? If $timezone is not specified, then the effective value of
$timezone is the value of the implicit timezone in the dynamic
context.
If $arg is the empty sequence, then the function returns the empty
sequence.
If $arg does not have a timezone component and $timezone is
the empty sequence, then the result is the value of $arg.
If $arg does not have a timezone component and $timezone is
not the empty sequence, then the result is $arg with $timezone
as the timezone component.
If $arg has a timezone component and $timezone is the empty
sequence, then the result is the local value of $arg without its timezone
component.
If $arg has a timezone component and $timezone is not the
empty sequence, then the function returns the value of the expression:
Let $dt be the value of fn:dateTime($arg,
xs:time('00:00:00')).
Let $adt be the value of fn:adjust-dateTime-to-timezone($dt,
$timezone)
The function returns the value of xs:date($adt)
Assume the dynamic context provides an implicit timezone of -05:00
(-PT5H0M).
let $tz-10 := xs:dayTimeDuration("-PT10H")
The expression fn:adjust-date-to-timezone(xs:date("2002-03-07")) returns xs:date("2002-03-07-05:00").
The expression fn:adjust-date-to-timezone(xs:date("2002-03-07-07:00")) returns xs:date("2002-03-07-05:00").
The expression fn:adjust-date-to-timezone(xs:date("2002-03-07"),
$tz-10) returns xs:date("2002-03-07-10:00").
The expression fn:adjust-date-to-timezone(xs:date("2002-03-07-07:00"),
$tz-10) returns xs:date("2002-03-06-10:00").
The expression fn:adjust-date-to-timezone(xs:date("2002-03-07"),
()) returns xs:date("2002-03-07").
The expression fn:adjust-date-to-timezone(xs:date("2002-03-07-07:00"),
()) returns xs:date("2002-03-07").
A dynamic error is raised if $timezone
is less than -PT14H or greater than PT14H or is not an
integral number of minutes.