Ephemera

Ephemera: items of fleeting use, or lasting a single day. A single item would be called an ephemeron.

​In the course of history, "ephemera" has described a fever (perhaps a 24-hour bug) and actual
insects like mayflies. But at present, ephemera usually refers to the scraps of paper that show a glimpse into the specific past.  

Like my grandmother's Red Cross Life Saving Corps certification card:

And this a ticket stub:

Which give a little color to this snapshot of Ruthie:

Ninety years of fleeting days since she was a kid at college with her life a big unknown ahead of her.