if you've edited data recently (a gdb feature class), either spatial or tabular, and you want to capture the "update date" and possibly a note about what was updated, without overwriting the "publication date" or "edition" feilds in the metadata, where should it go? Perhaps i'm interpreting the meaning of the publication/edition dates incorrectly and that's what they're for...? any known/definitive answer to this?
Time period of content: (Multiple Dates and Times)
The answer is "Nowhere". ESRI automagically adds a last updated date/timestamp to the metadata for you. To prove this to yourself: Look at your metadata in the FGDC ESRI stylesheet, the last entry on the Description tab is called "Details about this document". Click on that entry to spill it open and see the "Contents last updated date/timestamps".