For cases that Prophet doesn't cover I recommend bsts [0], which is much more flexible and powerful. Anything too complicated for bsts, I'll typically implement

For cases that Prophet doesn't cover I recommend bsts [0], which is much more flexible and powerful. Anything too complicated for bsts, I'll typically implement in Stan. [0] https://cran.r-project.org/web/packages/bsts/bsts.pdf https://cran.r-project.org/web/packages/bsts/bsts.pdf