Can Zelenskyy postpone the next Ukrainian election indefinitely due to war?
https://en.wikipedia.org/wiki/Volodymyr_Zelenskyy
Zelenskyy announced his candidacy in the 2019 Ukrainian presidential election on the evening of 31 December 2018, alongside the New Year's Eve address of then-president Petro Poroshenko on the TV channel 1+1. A political outsider, he had already become one of the frontrunners in opinion polls for the election. He won the election with 73.23 percent of the vote in the second round, defeating Poroshenko. He has positioned himself as an anti-establishment and anti-corruption figure.
Ukraine is a democracy and Zelenskyy had to be elected in order to assume office. However, because Ukraine is at war and the difficulties of holding an election during wartime, I was wondering if Ukraine's legal system gives him the right to postpone the elections indefinitely even if the war was to last 50 years. Does Ukraine's legal system give that power to the president?