The deadline for the ceasefire has been outlined in a draft US-Russia deal.
"The United States and Russia, as co-chairs of the ISSG [International Syria Support Group] and ISSG Ceasefire Task Force, announce the adoption on February 22, 2016, of the Terms for a Cessation of Hostilities in Syria attached as an Annex to this statement, and propose that the cessation of hostilities commence at 00:00 (Damascus time) on February 27, 2016," the statement reads.
Military action, including airstrikes conducted by Syria, Russia and the US-led coalition will continue against Daesh, al-Nusra Front, as well as other UN-designated terrorist groups.