The decision, he said, will give pro-Russian armed separatists the opportunity to lay down their weapons and Russian mercenaries to depart Ukraine.
Poroshenko said he expected that "We should gain support to the president's peace plan by all the participants in the Donbas events immediately after that. Very quickly."
The president added that the ceasefire will be very brief. He did not specify when the "unilateral ceasefire" would be implemented, but earlier stated that a ceasefire would be imminent once the country's eastern border was secured.
Notable deaths of 2014 [PHOTOS]
Syrian Al Qaida group executes Lebanese soldier