"For those of us who have limited time outdoors, a calendar-type project can form a needed auxiliary memory of lessons learned and observations made."

You might check around and see if there are any booklets produced locally for this information. As others have mentioned, dates can only be very general. Local conditions, the frequency of rainfall, recent fires, and esp ELEVATION all can alter dates because they aren't set in stone. For instance, many plants can live at various elevations, but when they produce can vary according to elevation. If you are mid-elevation and the berries are drying up there, go a thousand feet higher, and they may well still be producing where it's cooler. If the berries aren't ripe yet at your elevation, go a thousand feet lower, and they may be ready.

I am assuming that your original question about this is for personal survival (run out of unemployment), not disaster survival, when the competition would be fierce and the supply limited for the desperate population. In times of extreme famine, people have crawled over the ground on their knees, pulling up single blades of grass for consumption, all the trees and shrubs having long been stripped of fruits, nuts and leaves.

Let's hope it never comes to that!

Sue