The colours are a heatmap, red means the pickup is happening soon, blue is several months away. To find the actual date of each pickup, you can click on an area and it will tell you.
If you find the site useful, please consider buying me a beer, this mapping is thirsty work! Otherwise, feel free to send me a message through the contact form and tell anyone who would find this site useful.
Sure thing. Contact me and I'll see what I can do.