How to date an old photo
An undated photo can often be placed within a few years by combining several clues: the format, the photographer, the clothes, the background and what you already know about the family. Here is how to go about it, carefully.
Where do you start when dating an old photo?
With the object itself, before the picture: its material, format, edges and back. These physical clues are often the most reliable, because they depend on the techniques of the time.
Check the back for writing, a pencilled date, or a processing or studio stamp. Digitise both sides: the back is a source in its own right (see scanning photos with your phone).
What does the type of photo tell you?
The format often places a photo within a broad period. An image on a metal plate (daguerreotype, tintype) belongs to the early days of photography; a small portrait mounted on thick card, such as a carte de visite or cabinet card, points to studios of the later 19th and early 20th centuries.
Prints with deckled edges, square formats, instant photos and early colour prints point rather to the 20th century. These are broad trends, not exact dates.
| Clue | What it suggests | Caution |
|---|---|---|
| Image on metal or glass | early photography, 19th century | these processes lasted several decades |
| Portrait on a studio card mount | late 19th, early 20th century | the card's style helps narrow it |
| Deckled edges, small print | 20th-century snapshot | practice varied between labs |
| Instant or colour print | second half of the 20th century | colours age fast, don't rely on them |
How can the photographer's name help?
A studio stamp or printed name with an address is one of the best clues. Old trade directories, local record offices and libraries can often tell you when a studio was trading at that address.
Local history societies and genealogy forums sometimes know the photographers of their area well. Write down the exact name and address before you start searching.
What do clothes and backgrounds reveal?
Clothing, hairstyles, hats and accessories usually give a range of a few years to a decade. Sleeves, collars, hemlines and the cut of suits all change with fashion.
Be careful, though: people in the countryside or older relatives often wore older styles. The background offers other clues too: cars, shop signs, posters, buildings and household objects.
How do you cross-check with family history?
Estimate the age of the people you recognise, then compare it with their birth year: this is often the most precise method. A wedding, a christening, military service or a birth also give useful anchors.
Compare with other photos of the same family that are already dated. To work out who is in the picture, see identifying people in old photos.
Does restoring a photo help to date it?
It can make details readable that were lost in grain or fading, such as a fabric or a background. But always use the original scan for fine clues: restoration can smooth out small text or insignia.
Colourisation adds no dating information at all, since its colours are imagined. See the real colours of old photos and, to protect what you find, backing up family photos.
Frequently asked questions
Can you ever date a photo with certainty?
Rarely, unless a date is written on it or it shows a known event. Usually you end up with a range; record it as an estimate.
Where should I record the date I find?
Lightly in soft pencil on the back of the original, and in the file name or details of the digital copy.
Does yellowing show how old a photo is?
Not reliably: yellowing depends mostly on how the photo was stored, not just on its age.