According to a press release, the Magyar Nemzeti Bank unveiled a new 1,000-forint note with enhanced security features to be introduced 1 March 2018. The existing notes of the same denomination will be withdrawn starting 1 November 2018, and will be demonetized 1 November 2038.
Courtesy of Ilkka Malmi, Antje Bird, and Hartmut Fraunhoffer (Banknote-Online).