Lightroom - image modify date
When you edit a file LR puts a date on the Metadata
So the Metadata date will be the date of your last edit provided that the Metadata is "Up To Date"
You can also create a smart collect by "edit date" using "greater than", "less than", "equals" or "in the range"
HOpe this helps
|Al Fateh Grand Mosque by mallen1976|
from Your City - B&W Night Picture
|Fascia walkie talkie building London by ian herridge|
from Abstract Architecture
|Beakable by Hobbyfotograaf|
|St Paul's - DT NYC by mollymcd|
from Modern - Old-Fashioned