What is the concept of "All Todays" in philosophy?

"All Todays is like having many different days all at once, each doing its own thing."

Imagine you're playing with your favorite toy, a train set. You have one track where the train goes around in circles, and another where it zooms straight ahead. Now imagine that all those tracks are happening at the same time, but on separate pieces of paper. That’s like All Todays, each "today" is its own little world or activity, all going on together.

Think of it as having many friends over for a party. One friend is drawing pictures, another is telling stories, and someone else is playing hide-and-seek. All those activities are happening at the same time, that’s like All Todays in philosophy.

Each "today" could be a different adventure: one where you’re flying a kite, another where you're eating ice cream all day, and another where you're playing hide-and-seek with your brother. All those todays are like separate little worlds, all happening together, that’s the fun of All Todays!