This was answered elsewhere, so I am filling in for reference.
A list of lists do the job:
On Controller:
Dates = [ [{year, "2013"}, {month, "JAN"}], [{year, "2013"}, {month, "FEB"}] ],
and pass the var to the template: {dates, Dates}
On view:
{% for date in dates %}
Year: {{ date.year }}<br>
Month: {{ date.month }}<br>
{% endfor %}