Support Datetime interpolation

[Beforerr]

I’m wondering if it is possible to directly support interpolation over datetime, without converting datetime into number using Dates.value. So the following codes would just work.

using Dates

t = Millisecond.(collect(1:10:100))
u = 2.0collect(1:10)
A = @inferred(LinearInterpolation(
    u, t; extrapolation = ExtrapolationType.Extension))

[SouthEndMusic]

It looks like basic operations like division by a Millisecond type are not defined, so the internal computations need to use the underlying number values. Is there a function which can obtain the value that is not part of Dates? It would be easiest if this conversion is done in the interpolation object constructors and calls, unless you find it important that the Dates types are conserved internally.