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I like option 3 - to whit:
Each cover has the title and the year the action starts.
On the cover page inside is a line(s) stating that this story covers action from start timestamp to end timestamp.
A timestamp has the following format (as defined in DB2 - hey, that's where I live) YYYY-MM-DD-HH:MM:SS.MMMMMM
Thats Year, Month, Day, Hours, Minutes, Seconds, Microseconds
THEN, you keep a running list online that will allow anyone to print a list sorted by start timestamp at any time.
1. It keeps the cover fairly simple
2. It allows for infinite expansion, as duplicate timestamps are allowed!
3. It will always produce the correct order.
4. It's maintainable!
5. The format is set in stone and never has to be revised (a severe drawback to option 1 - take it from a DBA, don't build in a need to reformat, it is easy now, but you will hate it later)