BEIRUT (AP) — The international envoy to the Syrian conflict today called on President Bashar Assad’s regime to take the lead in a cease-fire during a major Muslim holiday later this month, calling it a “microscopic” step toward ending a crisis that he said could consume the whole region.

Lakhdar Brahimi told reporters in Beirut that if the government initiates the ceasefire, everyone he has talked to on the rebel side has said they also will observe the truce.

Brahimi’s push to get Assad and rebels seeking to topple him to stop fighting for the four-day Eid al-Adha feast set to begin Oct. 26 reflects how little progress international diplomacy has made in stopping 19 months of deadly violence in Syria.