This extensions adds some date functions for TWIG
The TWIG build in date function uses DateTimeInterface::format which does not support locales.
t3strftime uses the strftime method, wich supports locales.
So you can render day or month as names in your language.
{{ '2017-07-23T16:00:00Z'|t3strftime('%e. %B %G %H:%M Uhr') }}Outputs in Berlin Timezone:
23. Juli 2017 18:00 Uhr