Contributed by Christian Flothmann in #13554

When you use the date filter to display dates in Twig templates, Symfony applies the default date formatting defined in the Twig Core extension. The same goes for numeric values formatted with the number_format filter.

These default formats can be overridden using the arguments of each filter:

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        {{ post.published_at|date("F jS \\a\\t g:ia") }}
    

However, if you use the same custom date or number formatting for all the values rendered in the application templates, this technique is very cumbersome. In Symfony 2.6 you can set the default formatting inside a controller as follows:

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        $this->get('twig')->getExtension('core')->setDateFormat('d/m/Y', '%d days');
    

Setting up the default formatting for the entire application is even more complex, because you usually need to set up a dedicated listener. Symfony 2.7 adds two new Twig configuration options to define the default formatting of both numbers and dates without the need to write custom code.

Use the date configuration option under the twig key to override any of the default date formatting options:

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        # app/config/config.yml
twig:
    date:
        format: d.m.Y, H:i:s
        interval_format: '%%d days'
    

You can also define the timezone option to use it when formatting dates:

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        # app/config/config.yml
twig:
    date:
        # ...
        timezone: Europe/Paris
    

Similarly, the default formatting of numeric values can now be defined using the new number_format option under the twig key:

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        # app/config/config.yml
twig:
    number_format:
        decimals: 2
        decimal_point: ','
        thousands_separator: '.'
    