yearmonthday function

[Balinus]

Hello again!

Similar to the daysinmonth issue, I think another useful function would be the yearmonthday.

To put in context, I'm developing a function that does some daily calculation from sub-daily temporal data (daily means, sums, etc..). Hence, to construct the output array (daily data), I need to know how many unique days is contained in the input array (sub-hourly data).

For example:

using Dates
d = DateTime(2000, 01, 01, 0, 0, 0):Hour(1):DateTime(2000,12, 31)
arraylen = unique(Dates.yearmonthday.(Dates.days.(d)))

dataout = Array{Float64}(undef, N, M, arraylen)

But the function is not defined for DateTimeNoLeap, etc...

For reference, the original Julia Dates yearmonthday function is here.
https://github.com/JuliaLang/julia/blob/c670f1acdba1971b8545f1c3f3b0cfe55ee0d3f5/stdlib/LibGit2/src/signature.jl#L40

[Alexander-Barth]

Hi Philippe, I just implemented these functions:

julia> Dates.yearmonthday(NCDatasets.DateTimeStandard(2004,1,1,0,0,0))
(2004, 1, 1)

julia> Dates.yearmonth(NCDatasets.DateTimeStandard(2004,1,1,0,0,0))
(2004, 1)

If this is OK, I will make a new release (unless there are some other one-line-functions to implement for the next release)

[Balinus]

Nice, thanks Alexander! Really appreciated!

No other functions comes to mind right now.