The Caretaker Cabinet of Ioannis Grivas lasted about 40 days. It was sworn in on October 12, 1989 when the government of Tzannis Tzannetakis completed its work. The outgoing chairman of the Court of Cassation, Ioannis Grivas formed a caretaker government, which conducted the Greek legislative election, November 1989.
References
Caretaker Cabinet of Ioannis Grivas Wikipedia(Text) CC BY-SA