Let's write the dates in English, focusing on both the numbers and the months. Here’s how we can do this step by step:

1. 7 March 1999 - This can be written as "the seventh of March, nineteen ninety-nine."
2. 1 September 1974 - This can be written as "the first of September, nineteen seventy-four."
3. 22 April 1911 - This can be written as "the twenty-second of April, nineteen eleven."
4. 11 March 1951 - This can be written as "the eleventh of March, nineteen fifty-one."
5. 12 December 2024 - This can be written as "the twelfth of December, twenty twenty-four."

By following this format, we express each date clearly and in full English. Remember to use ordinal numbers (like first, second, third, etc.) for the days and the correct form for the years.