Why people in Russia and China are panicking is beyond me.
Anyway, the Catholic Encyclopaedia has something to add to the conversation, a part which is quoted below.
As was stated above, the signs that are to precede the judgment give no accurate indication of the time when it will occur (Mark 13:32). When the Disciples asked the Saviour: "Lord, wilt thou at this time restore again the kingdom to Israel?" He answered: "It is not for you toknow the times or moments, which the Father hath put in his own power" (Acts 1:6-7). The uncertainty of the day of judgment is continually urged by Christ and the Apostles as an incentive to vigilance. The day of the Lord will come "as a thief" (Matthew 24:42-43), like lightning suddenly appearing (Matthew 24:27), like a snare (Luke 21:34), as the Deluge (Matthew 24:37).