Looking at the freemarker docs, s/b something more like this to specify date format:

<#-- SimpleDateFormat patterns: -->
${lastUpdated?string["dd.MM.yyyy, HH:mm"]}
${lastUpdated?string["EEEE, MMMM dd, yyyy, hh:mm a '('zzz')'"]}
${lastUpdated?string["EEE, MMM d, ''yy"]}
${lastUpdated?string.yyyy} <#-- Same as ${lastUpdated?string["yyyy"]} -->