将日期转换为dateTime格式的XSLT1.0

<xsl:template match="/">
  <xsl:call-template name="convertDate">
    <xsl:with-param name="date" select="'2022-01-01'" />
  </xsl:call-template>
</xsl:template>

<xsl:template name="convertDate">
  <xsl:param name="date" />
  <xsl:value-of select="concat(substring($date, 1, 4), '-', substring($date, 6, 2), '-', substring($date, 9, 2), 'T00:00:00')" />
</xsl:template>

<xsl:stylesheet version="1.0"
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  xmlns:msxsl="urn:schemas-microsoft-com:xslt"
  xmlns:my="urn:my-scripts">

  <msxsl:script language="JScript" implements-prefix="my">
    function convertDate(date) {
      var dateTime = date + 'T00:00:00';
      return dateTime;
    }
  </msxsl:script>

  <xsl:template match="/">
    <xsl:value-of select="my:convertDate('2022-01-01')" />
  </xsl:template>

</xsl:stylesheet>