When exact dates are missing, group photos by event instead — using clues like the occasion, the people present, or a distinctive location — and name each group after the event itself rather than trying to force a date onto photos that don’t have one.
What you need
- The undated photos you want to group
- Any memory of major family events, even approximate ones (a wedding, a house move, a particular holiday)
- Folders or albums you can name after events rather than dates
List the events first
Think through the major recurring events and one-off occasions in your family’s history first — birthdays, holidays, house moves, graduations — since these make natural grouping categories even without exact dates attached. It’s fine for an event-based group to span an uncertain date range, such as ‘Christmas, mid-1980s’.
How to group photos by event
- List out the major recognisable events or occasions you can identify across your photo collection.
- Create a folder or album for each event, named descriptively, such as ‘Beach House Holidays’ or ‘Nan’s 70th Birthday’.
- Go through your undated photos and sort each one into the event it most likely belongs to, based on location, people present, or visible decorations and clothing.
- For events that repeated over the years (like annual holidays), consider adding an approximate era to the folder name, such as ‘Beach House Holidays (1980s)’, if you can narrow it down.
- Photos that don’t clearly belong to any identifiable event can go into a general ‘Everyday Life’ or ‘Uncategorised’ group rather than being forced into an event they don’t fit.
- Once grouped, add a short note to each folder describing what you know about the event, for context.
Check every photo fits somewhere
Look through each event-based group and check the photos inside are consistent with each other — similar location, similar people, similar occasion — which suggests the grouping is accurate. If a folder contains photos that clearly don’t belong together, split it into more specific groups.
If you can’t tell which event a photo is
If you can’t identify which event a photo belongs to, showing it to family members who might recognise the location or people is often more effective than trying to work it out alone. It is completely fine to have a general ‘Uncategorised’ group for photos that don’t fit anywhere else — not every photo needs to be perfectly categorised.
Next step
Once your photos are grouped by event, tagging them by decade for the ones you can narrow down further adds another useful layer of organisation on top of the event groupings.
Sources and date checked
Researched from general published guidance on organising personal and family photo archives, not a hands-on test performed for this article. Date checked: 22 September 2026.