What makes you say that? This could stretch over a year. We have already been 3 months and nowhere near peak yet.
1) Almost everyone in the world who is susceptible has it, or had it.
2) We implemented a way to slow down the global growth rate, or it slowed down by itself.
One way or another, we will know in a just a few months.
If you want to check the math, skip to about 3:20 on this video from 3Blue1Brown, Exponential growth and epidemics.