I remember that one time when I had an argument with a friend about the words yesternight, and yesteryear. I insisted that these words do exist and that they mean the same as the word yesterday – only that yesternight means last night, and yesteryear simply means last year.
I wanted to search in the dictionary and prove that these are valid words but I have forgotten about it not until today. I opened my Merriam Webster Dictionary App and searched for the word Yester.
The words exist! Yey! I was right all along! 🙂