sieve vacation with start and end date

[Marcus Schopen]

Hi,

does sieve vacation understand a start and end date? Something like this
does not work:

-------
require ["date", "relational", "vacation"];
if allof(currentdate :value "ge" "date" "2007-06-30",
         currentdate :value "le" "date" "2007-07-07")
{ vacation :days 7  "I'm away during the first week in July."; }
-------

System: cyrus 2.4.12 on Ubuntu 12.04 LTS

Cheers
Marcus