Dates allows non-broadcasted arithmatic

[pdeffebach]

Dates redefines +(::Array{Date}, Date...) = .+, meaning that array + scalar doesn't throw an error.

julia/stdlib/Dates/src/arithmetic.jl

Line 94 in f8d82cc

(-)(x::AbstractArray{T}, y::T) where {T<:TimeType} = x .- y

This should probably be deprecated for consistency.

[JeffBezanson]

Oh dear, how did we miss this. Maybe add a deprecation warning in v1.1?

[StefanKarpinski]

I suspect that Dates will need a major version upgrade in the near future, pretty much as soon as we figure out how to version and allow selection of stdlibs. (Or maybe just move it out of stdlib.)

[JeffBezanson]

Deprecated in #29509.