Inconsistent resulting types for zero and one for Dates

[jagot]

julia> using Dates

julia> x = Date(2020):Week(1):Date(2021)
2020-01-01:1 week:2020-12-30

julia> dx = step(x)
1 week

julia> zero(dx)
0 weeks

julia> one(dx)
1

CC @mcabbott

[mcabbott]

I presume the reasoning is this:

julia> one(dx) * Week(3)
3 weeks

julia> zero(dx) + Week(3)
3 weeks

[andreasnoack]

It's on purpose the one doesn't have units. That's why there is oneunit

julia> oneunit(dx)
1 week

[jagot]

That makes sense.