After what period must a mobilized serviceman return to

In accordance with Article 23 of the Law of Ukraine "On Military Obligation and Military Service" for citizens of Ukraine who are called up for military service, the following terms of military service are established in calendar calculation for military servicemen who undergo military service under conscription during mobilization, for a special period , - until the terms determined by the decision of the President of Ukraine, including in connection with the end of a special period or the announcement of demobilization.