datesupport.millisecondsAsString?number returns time + 1 hour

nathan is right, these methods used as you've shown will give you the date/time in the timezone of the server. For example, you can actually see the timezone if you use the freemarker ?string.long directive:

${.now?string.long}

 If you want the date in UTC, you can use the ?iso_utc directive:

${.now?iso_utc}

 More details here:

http://freemarker.org/docs/ref_builtins_date.html