`Date(Dates.Week(5), Dates.Year(2023))` (week, year) constructor is not working

[isentropic]

Relevant docs:
https://docs.julialang.org/en/v1/stdlib/Dates/#Constructors

MWE:

julia> Date(Dates.Week(5), Dates.Year(2023),)
2023-01-01

julia> versioninfo()
Julia Version 1.8.5
Commit 17cfb8e65ea (2023-01-08 06:45 UTC)
Platform Info:
  OS: Linux (x86_64-linux-gnu)
  CPU: 16 × 12th Gen Intel(R) Core(TM) i7-1260P
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-13.0.1 (ORCJIT, goldmont)
  Threads: 8 on 16 virtual cores

[George9000]

Here's the relevant source, line 342 onward, which shows the constructor only accepts year, month, and day periods.

function Date(period::Period, periods::Period...)
    y = Year(1); m = Month(1); d = Day(1)
    for p in (period, periods...)
        isa(p, Year) && (y = p::Year)
        isa(p, Month) && (m = p::Month)
        isa(p, Day) && (d = p::Day)
    end
    return Date(y, m, d)
end

However, this works for your use case:

julia> Date(date -> Dates.week(date) == 5, 2023, 01, 01)
2023-01-30

[isentropic]

There is some discussion with the community too. Once we arrive at a good solution perhaps I will send a PR implementing this function later. https://discourse.julialang.org/t/determine-date-range-given-year-and-week-number/93878