Ember/Handlebars: Localization Helper with parameter array

I want to localize a string that contains multiple placeholders.

E.g:

Hello %@1, today is %@2 

I'd like to pass an array to the localization helper in my template like so:

But that doesn't work, even though the documentation says it should.

What does work is

But the data I receive to display is an array and I don't want to store each element in a seperate variable.

How can I get the loc helper in the template to work with an array of data? Am I doing something wrong?