This filter is a date and time formatting function. It displays the date and time of the specified country and it can also translate this type of data - so it handles the PHP language translations. Regarding its parameters, it puts the values of the above two filters together (e.g. if its parameter is full, the date and time will be displayed as full as well).
{{ '1999-01-01 13:13:13'|localized_datetime(contact.12, 'long') }},A possible result of the above example is 1999 01 January, 13:13:13.