To avoid vacation notices being sent after the vacation terminates, users requested the possibility to set the time frame in which a vacation notice should be sent instead of manually having to deactivate the vacation notice.

With this addition it becomes possible. In the HTTP-API you will now find the test currentdate which enables you to compare a date with the current date in sieve scripts. A detailed structure of the JSON object for this test can be found in http://oxpedia.org/wiki/index.php?title=HTTP_API_MailFilter#currentdate.

Please note that your sieve server must be capable of RFC 5260 and RFC 5231 to support that new feature.