This post is a follow-up to the original excel-lambda-depn.schedule post.
I created the video below to show the steps involved in creating that LAMBDA from scratch, including a modification which allows the schedule to be produced by month as well as by year.
some of the text in the video is quite small, so I recommend a resolution of no lower than 480p (higher if possible) and full screen. Chapter links are available in the video description on YouTube.