Formatting DateTime to week number

Question

I'm trying to format a DateTime object to a String by using the Dates.format() function. I'd like to get the week number for a specific time, however I can't find right formatting option in the docs.

I know I could get this by running Dates.week but I would really like to know if it's possible via format to have cleaner code (and crack a code golfing challenge...).

Here's some actual code:

julia> my_time = now()
2018-03-22T08:16:15.601

julia> Dates.week(my_time)
12

julia> Dates.format(my_time, "Y m d H:M:S")
"2018 3 22 8:16:15"

In R, I could do "%V" to get the weeks formatted. Is there a similar way in Julia?

Answer 1

No, there isn't a format specifier like %V:

julia> Base.Dates.CONVERSION_SPECIFIERS
Dict{Char,Type} with 12 entries:
  'm' => Base.Dates.Month
  'd' => Base.Dates.Day
  'M' => Base.Dates.Minute
  'Y' => Base.Dates.Year
  'e' => Base.Dates.DayOfWeekToken
  's' => Base.Dates.Millisecond
  'U' => Base.Dates.Month
  'E' => Base.Dates.DayOfWeekToken
  'H' => Base.Dates.Hour
  'y' => Base.Dates.Year
  'u' => Base.Dates.Month
  'S' => Base.Dates.Second

The in the code for these specifiers there's a note that there should be a way for packages to add more.