I have additional color & temperature charts that can be found for free on my blog.

I have a full YouTube Tutorial for this blanket also.

How much yarn you need will depend on the weather (which in most cases is very unpredictable). I would suggest starting with at least 2 skeins of each color and 5 for the border color.

To make up the difference for the different number of days in each month, we will make up for that with the border rows. Each square will have 34 rows each, so if the month has 30 days, you will do 4 rows of border color. 31 days, 3 rows of border color. 28 days, 6 rows of border color.

all additional info can be found in the blog post