KYIV, Ukraine (AP) — Russian President Vladimir Putin on Thursday ordered Moscow’s armed forces to observe a 36-hour cease-fire in Ukraine this weekend for the Russian Orthodox Christmas holiday, the first such sweeping truce move in the nearly 11-month-old war.

Putin did not appear to make his cease-fire order conditional on a Ukrainian agreement to follow suit, and it wasn’t clear whether hostilities would actually halt on the 1,100-kilometer (684-mile) front line. Ukrainian officials have previously dismissed Russian peace moves as playing for time to regroup their forces and prepare for additional attacks.

At various points during the war that started on February 24, Putin has ordered limited and local truces to allow evacuations of civilians or other humanitarian purposes. Thursday’s order was the first time Putin directed his troops to observe a cease-fire throughout Ukraine.

“Based on the fact that a large number of citizens professing Orthodoxy live in the combat areas, we call on the Ukrainian side to declare a cease-fire and give them the opportunity to attend services on Christmas Eve, as well as on the Day of the Nativity of Christ,” according to Putin’s order, addressed to Defense Minister Sergei Shoigu and published on the Kremlin’s website.

Putin acted at the suggestion of the head of the Russian Orthodox Church, Patriarch Kirill, who proposed a truce from noon Friday through midnight Saturday, local time. The Russian Orthodox Church, which uses the ancient Julian calendar, celebrates Christmas on January 7 — later than the Gregorian calendar — although some Christians in Ukraine also mark the holiday on that date.

Ukrainian presidential adviser Mykhailo Podolyak dismissed Kirill’s call as “a cynical trap and an element of propaganda.” President Volodymyr Zelenskyy had proposed a Russian troop withdrawal earlier, before December 25, but Russia rejected it.

Kirill has previously justified the war as part of Russia’s “metaphysical struggle” to prevent a liberal ideological encroachment from the West.

Adding to the possibility of a cease-fire were diplomatic efforts. Putin spoke by phone with Turkey’s president on Thursday and the Kremlin said Putin “reaffirmed Russia’s openness to a serious dialogue” with Ukrainian authorities.

Turkish President Recep Tayyip Erdogan urged Putin to implement a “unilateral cease-fire,” according to a statement from the Turkish president’s office.

Erdogan also told Zelenskyy later by telephone that Turkey was ready to mediate a “lasting peace.” Erdogan has made such an offer frequently. It has already helped broker a deal allowing Ukraine to export millions of tons of grain, and it has facilitated a prisoner swap.

Russia’s professed readiness came with the usual preconditions: that “Kyiv authorities fulfill the well-known and repeatedly stated demands and recognise new territorial realities,” the Kremlin said, referring to Moscow’s insistence that Ukraine recognise Crimea as part of Russia and acknowledge other illegal territorial gains.

Previous attempts at peace talks have fallen at that hurdle, as Ukraine demands that Russia withdraws from occupied areas at the very least.