[Zope] Sort by content creation date

[Patrick Romano]

I want to sort a certain number of Kubes by their content creation date, 
which is   DD/MM/YY,
but if I do it like that

<dtml-in expr="news.objectValues('Kube')"  sort="content_creation_date">

the Kubes are sorted by date starting from the left : sorted by DD first.
How can I achieve to have it soted by YY without changing the order of my 
date (DD/MM/YY)?

Thanks,
Patrick



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