If I were pushing the NWO agenda, I'd make everything converge near the beginning of winter in the northern hemisphere... The goal is population reduction and max chaos. Do it when resources and ability to scramble and plant/grow/hunt is most reduced.
And, who knows, maybe a king will be crowned in the Spring to save us all as we buy into his globalist agenda... hmmm...
Honestly, no idea how things play out, but these are the things that play in my head re how tptb take total control. At what point do they shift from slow drip to highspeed power grab?