FunctX XQuery Function Library > Dates, Times and Durations > Year >

functx:first-day-of-year

The first day of the year of a date

Description

The functx:first-day-of-year function returns the date representing the first day of the year of $date as an xs:date value.

The $date argument must be castable to xs:date, meaning that it must have the type xs:date or xs:dateTime, or be an xs:string or untyped value of the form YYYY-MM-DD.

Arguments and Return Type

XQuery Function Declaration

declare namespace functx = "http://www.functx.com";
declare function functx:first-day-of-year
  ( $date as xs:anyAtomicType? )  as xs:date? {

   functx:date(year-from-date(xs:date($date)), 1, 1)
 } ;

Examples

functx:first-day-of-year(xs:date('2004-01-23'))

2004-01-01

functx:first-day-of-year(
     xs:dateTime('2004-01-23T12:00:13'))

2004-01-01

functx:first-day-of-year('2004-03-23')

2004-01-01

Depends On

See Also

History