A method includes detecting content items stored locally on a client device, each content item including a time stamp and geospatial metadata; identifying one or more sets of content items based on their time stamps being within a first predetermined time range; determining, for each set of content items, a geographic location associated with the content items of the set based on the geospatial metadata of each content item; generating a list of all geographic locations associated with the sets of content items; selecting subsets of content items based on determining that the time stamps associated with each content item of the subset are within a second predetermined time range; determining, from the selected subsets of content items, non-overlapping subsets of content items based on a parent geographic location associated with the selected subset; and sending instructions to categorize content items into the non-overlapping subsets of content items.