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fn.adjustDateToTimezone

fn.adjustDateToTimezone(
   $arg as Date?,
   [$timezone as xs.dayTimeDuration?]
) as Date?

Summary

Adjusts an xs:date value to a specific timezone, or to no timezone at all. If $timezone is the empty sequence, returns an xs:date without a timezone. Otherwise, returns an xs:date with a timezone. For purposes of timezone adjustment, an xs:date is treated as an xs:dateTime with time 00:00:00.

If $timezone is not specified, then $timezone is the value of the implicit timezone in the dynamic context.

If $arg is the empty sequence, then the result is the empty sequence.

A dynamic error is raised [err:FODT0003] if $timezone is less than -PT14H or greater than PT14H or if does not contain an integral number of minutes.

If $arg does not have a timezone component and $timezone is the empty sequence, then the result is $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 localized value of $arg without its timezone component.

If $arg has a timezone component and $timezone is not the empty sequence, then:

Let $srcdt be an xs:dateTime value, with 00:00:00 for the time component and date and timezone components that are the same as the date and timezone components of $arg.

Let $r be the result of evaluating fn:adjust-dateTime-to-timezone($srcdt, $timezone)

The result of this function will be a date value that has date and timezone components that are the same as the date and timezone components of $r.

Parameters
$arg The date to adjust to the new timezone.
$timezone The new timezone for the date.

Example

Assume the dynamic context provides an implicit timezone
of -05:00 (-PT5H0M).

fn.adjustDateToTimezone(xs.date("2002-03-07"))
=> 2002-03-07-05:00.

fn.adjustDateToTimezone(xs.date("2002-03-07-07:00"))
=> 2002-03-07-05:00. $arg is converted to the xs:dateTime
"2002-03-07T00:00:00-07:00". This is adjusted to the implicit
timezone, giving "2002-03-07T02:00:00-05:00".

fn.adjustDateToTimezone(
    xs.date("2002-03-07"), 
    xs.dayTimeDuration("-PT10H"))
=> 2002-03-07-10:00.

fn.adjustDateToTimezone(
    xs.date("2002-03-07-07:00"), 
    xs.dayTimeDuration("-PT10H"))
=> 2002-03-06-10:00. $arg is converted to the xs.dateTime
"2002-03-07T00:00:00-07:00". This is adjusted to the given
timezone, giving "2002-03-06T21:00:00-10:00".

fn.adjustDateToTimezone(xs.date("2002-03-07"), ())
=> 2002-03-07.

fn.adjustDateToTimezone(
    xs.date("2002-03-07-07:00"), ())
=> 2002-03-07.

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