Called by:

• Mobilizon.GraphQL.Resolvers.Admin.get_list_of_languages (L184)
• Mobilizon.Service.DateTime.datetime_to_string (L17)
• Mobilizon.Service.DateTime.datetime_to_time_string (L25)
• Mobilizon.Service.DateTime.datetime_to_date_string (L33)
• Mobilizon.Service.DateTime.datetime_relative (L54)