timezone utc

I have this type of DateTime: This is in UTC and I need to convert it to: So far I have this in my template: {{ date(date_from_format("Y-m-d\TH:i:s.u\Z", '{$posts.created_at}'), '') }} How do I get this to convert and display properly? Right now it displays as Jan 1, 1970, and I'm not sure...