You can easily import historic events using the Really Simple CSV Importer plugin. Just follow the instructions here.
This Day In History is pretty flexible – you can use it to display a variety of daily content – jokes, tips, quotes and alike.
You can show up to 5 posts, or post title links with Random One Cat Widget.
You can choose to show the Random One Cat Widget widget or post title or not by selecting from the drop-down list.
You can use Random One Cat Widget to display a random post from a given category.