def METHOD_NAME(self, number, format=None):
    """Returns the english name of month by number. Format is either '' or
    'a' (long or abbreviation).
    >>> ttool = TranslationServiceTool()
    >>> ttool.month_english(1)
    'January'
    >>> ttool.month_english(1, 'a')
    'Jan'
    """
    return monthname_english(number, format=format)