Align paragraph to the bottom of the page in Microsoft Word

Just like in the old days of HTML, creating a table that has the size of the entire page with two rows will do the trick. You can anchor the table to the page. Inside each table cell, you can select horizontal and vertical alignment.

As an alternative, you can create one table cell, make sure the document text goes around or above & below it and anchor the table to the bottom of the page. Set the row height to fit. This way, you don't have the disadvantages of the table (eg different behavior of tab) in the regular body text.

Actually, I've seen official internal document templates of a company that used this trick to layout its text for project templates etc.

The cleanest way to do this is to use page setup dialogue (under Layout in the ribbon) Make sure to add section break before and after the text you wish to be on the bottom of the page. Always start new section on a new page.