mailcow-dockerized/data/web/inc/lib/sieve/extensions/date.xml

<?xml version='1.0' standalone='yes'?>

<extension name="date">

	<test name="date">
		<parameter type="matchtype" occurrence="optional" />
		<parameter type="comparator" occurrence="optional" />
		<parameter type="tag" name="zone" regex="(zone|originalzone)" occurrence="optional">
			<parameter type="string" name="time-zone" follows="zone" />
		</parameter>
		<parameter type="string" name="header-name" />
		<parameter type="string" case="ignore" name="date-part"
		 regex="(year|month|day|date|julian|hour|minute|second|time|iso8601|std11|zone|weekday)" />
		<parameter type="stringlist" name="key-list" />
	</test>

	<test name="currentdate">
		<parameter type="matchtype" occurrence="optional" />
		<parameter type="comparator" occurrence="optional" />
		<parameter type="tag" name="zone" regex="zone" occurrence="optional">
			<parameter type="string" name="time-zone" />
		</parameter>
		<parameter type="string" case="ignore" name="date-part"
		 regex="(year|month|day|date|julian|hour|minute|second|time|iso8601|std11|zone|weekday)" />
		<parameter type="stringlist" name="key-list" />
	</test>

</extension>