Q 2668 on 11 Jan had 4 Booms, but we are already inside of 18 days for the -21 countdown. That being said, I think it will be something bigger then a simple arrest, after all Q said in 2912 that tactical nukes are better, hat leads me to believe something very big and decisive is coming. But I do like your thinking about 18 till 4, I missed that angle.