I received the following image as Valentine's Day text message from a friend who loves Fireball. I'm not sure where it originated and I have been unable to find the image on line but it does provide the perfect set up for a review of the difference between then and than.
He drank some whisky and then he had dinner. He like the whisky better than the dinner.
Than is a subordinating conjunction used to relate a sense of comparison.
Then is an adverb which conjoins two acts by order of time of occurrence.
Which reminded me of this meme that was popular a while back.