Dummy variable coefficient interpretation is a bit unclear

Hi there,

I was wondering if someone could provide some insight on interpreting the coefficients for dummy variables in a Prophet model.

I'm basically using seasonality + holidays to estimate sales, and sales are in dollars and vary in the hundreds to thousands.

However, the coefficients all seem to be standardized, never higher than 1 and never lower than -1, though they're dummy variables and, according to the documentation, do not get standardized.

How should I interpret these coefficients? Everything in the documentation I've seen seems to indicate that these coefficients haven't been standardized, so these should be viewed as expected increase/decrease in $ sales. However, this makes no sense here.

Is it percentage increase/decrease?

Thanks