The ceasefire agreement must:

1) Be confirmed by reputable media outlets, and

2) Last at least one week with no significant recorded violations of the ceasefire (I'm defining "significant violation" as a military action by either side that results in at least one death during the agreed upon duration of the ceasefire)

Since the ceasefire would need to last at least 7 days in 2024, the question will still resolve as NO if a ceasefire agreement is reached at the end of December, e.g. on December 28th.

If somehow a permanent peace deal is reached without a temporary ceasefire, then this question will also resolve YES.