The short answer
If the photo is digital, from a phone, a camera or a scan, look inside the file: the field Date taken (EXIF DateTimeOriginal) usually holds the moment the picture was taken, while a scan holds the day it was scanned. If it is a print, there is no date inside, so you read the clues: the back, the photographer's stamp, the card, the format, any date printed on it, and what is in the picture, such as clothes and cars. The free photo date finder does the first step for you: it reads the date from a digital photo, and for a print it turns a short checklist into a period, with sources. Nothing is uploaded.
Updated 12 October 2026; first published 24 September 2026. The years in the table come from the museums and archives listed at the bottom of this page.
1. The date inside the file (digital photos and scans)
Phones and digital cameras write the moment of the picture into the file. That is the most precise clue there is, and it takes ten seconds to read:
- iPhone or iPad: open the photo and swipe up, or tap the (i).
- Android, Google Photos: open the photo and swipe up.
- Windows: right click the file, choose Properties, then the Details tab, and read Date taken.
- Mac: in Photos, select the photo and press Command and I.
Three things make this date wrong. A scan is a new file and carries the day of the scan, not the year of the print; see scanned photos show the wrong date. A photo sent through a messaging app often loses its date and only keeps the day it arrived. And a camera whose clock was never set writes a date that can be years off. When only a file date is left, the photo date finder says so, instead of guessing. More on digital photos in when was this photo taken.
2. What the photo is made of
For a print, start with the object itself. Each type of photograph belongs to its own period.
| Format | How to recognise it | Period |
|---|---|---|
| Daguerreotype | A small polished silver plate, always in a protective case; depending on the angle it looks negative, positive or like a mirror | 1839 to the 1850s; in Britain sold into the early 1850s |
| Ambrotype (collodion positive) | An image on glass with a black backing, usually in a case or frame; positive from every angle | From about 1853; gone from high street studios in the 1860s, used by street photographers until the 1880s |
| Tintype (ferrotype) | An image on a thin black-enamelled iron plate: a magnet sticks to it | From 1855 in America; popular in Britain from the 1870s; still made in the 1940s |
| Carte de visite | A small photo on card, the size of a visiting card, often with the photographer's name on the back | Patented in 1854, popular from 1860 until the early twentieth century |
| Cabinet card | A larger photo on thick card, about 16.5 by 11 cm (6.5 by 4.25 inches) | 1866 to about 1914 |
| Round snapshot | A circular print from the first Kodak cameras | 1888 (Kodak No. 1) and 1889 (Kodak No. 2) |
| Colour print | A colour photo printed from colour negative film | From 1942, when Kodak introduced Kodacolor; colour slide film from 1935 |
| Small square print | A square image from the 28 by 28 mm frame of 126 cartridge film, used in the Kodak Instamatic | From 1963 |
| Polaroid, peeled apart | An instant print from the first Polaroid Land cameras | From 1948 |
| Polaroid SX-70 | A square instant print with a wide white border at the bottom | From 1972 |
A start date is the most useful part: a photo cannot be older than its format. The end dates are softer, because some formats lived on for years with travelling and seaside photographers.
3. The card: corners, thickness and colour
On cartes de visite and cabinet cards, the mount is a clock of its own. Cartes from the 1860s usually have square corners; mounts with rounded corners came in the 1870s. In general, the thinner the mount, the earlier the photograph. On cabinet cards, cream mounts were always popular, while dark mounts in black, dark brown, green or burgundy appeared in the 1880s and 1890s, as did bevelled edges finished in gold or silver.
4. The back of the print
- The photographer. A stamp or printed name leads to a studio that was active only for a certain number of years, and an address narrows it further if the studio moved. A low negative number on the back points to the early years of a studio. For Belgium, the FOMU Directory of Belgian Photographers (fomu.atomis.be) has some 8,600 entries for photographers and studios active between 1839 and 1914. Try several spellings.
- Printing on the paper. Kodak colour paper carried A Kodak Paper on the back from 1961 to 1972, and This Paper Manufactured by Kodak from 1972 to about 1989.
- A tax stamp. On American photographs, a revenue stamp on the back dates the print to between August 1864 and August 1866.
- A postcard back. In the United States, the divided back, with the message and the address on the same side, was used from 1907.
- Handwriting. A pencil note is a good lead, but check it against the other clues: family stories can be wrong.
5. A date printed on the photo
Some labs printed the month and year on the border or the back. That is when the film was printed, which can be weeks or months after the picture was taken, so read it as "this year or a little before". A date burned into the picture itself, in orange digits in a corner, comes from the camera's clock, which was often never set. If you want such a stamp gone from a copy, see how to remove a date stamp from a photo.
6. Clothes and hairstyles, with caution
Women's fashion helps more than men's, because silhouettes changed more clearly: crinolines in the 1850s, bustles in the 1880s. Men's clothes usually only date a photo to a decade, with collars, ties and facial hair as clues. Look at the youngest adults in the picture, because older people often kept wearing what they were used to, fashion in the countryside followed the city by some years, and people put on their best clothes for the photographer. Clothing gives you the earliest likely date, not the exact one.
7. Cars, buildings and ages
Anything in the background with a known date is a clue. A car cannot be older than its model year. A shop front, a new church tower or a house before its extension each set a limit. And the people themselves are a clue: if you know when the child on the chair was born, a guess at their age gives you the year.
What if nothing helps
- Ask the family. Show the photo to the oldest relatives and to anyone who knew the place. "That was the summer before your uncle left" is a date.
- Compare. Photos from the same album page, envelope or box are often from the same years. Date one, and you have a range for the others.
- Use the checklist. The free photo date finder asks what you can see (the material, the colour, the edge, the back, a printed year) and combines the answers into a period, with the source behind each year. It does not guess from faces.
- Treat an AI estimate as one clue. Some tools estimate a year from the image itself. That can point in a direction, but it is not a date. Check it against the clues above.
- Write down the estimate. "About 1925" is far more useful to the next person than an empty back.
Who is in the photo?
- Compare with photos whose names and dates you do know: the same ears, the same nose, the same house in the background.
- Memorial cards often carry a photo of the deceased. Look in the drawer or the missal at home, and in the collections of local family history societies.
- Ask anyone still living who might know. Bring the photo, and write the name down straight away. Our twenty questions to ask your parents are a good way to start that conversation.
- Reverse image search can turn up a lead, but it is not proof. Be careful with services that recognise faces: photos of family are personal data.
Once you know the year
Write the year and the names on the back with a soft pencil, never with a ballpoint or a marker. For a scan, start the file name with the year, such as 1925_wedding_Anna_and_Jozef.jpg, and write the year into the file as well. Then drag the folder onto the free photo timeline to see which years are missing. A faded or torn print can be restored for free, without an account; the result says visibly that AI was used, and the original stays as it is.
Sources
- National Science and Media Museum, How to spot a daguerreotype: blog.scienceandmediamuseum.org.uk/find-out-when-a-photo-was-taken-identify-daguerreotype-photography
- National Science and Media Museum, How to spot a collodion positive (ambrotype): blog.scienceandmediamuseum.org.uk/find-out-when-a-photo-was-taken-identify-collodion-positive-ambrotype
- National Science and Media Museum, How to spot a ferrotype or tintype: blog.scienceandmediamuseum.org.uk/find-out-when-a-photo-was-taken-identify-ferrotype-tintype
- National Science and Media Museum, How to spot a carte de visite: blog.scienceandmediamuseum.org.uk/find-out-when-a-photo-was-taken-identify-a-carte-de-visite
- National Science and Media Museum, How to spot a cabinet card: blog.scienceandmediamuseum.org.uk/find-out-when-a-photo-was-taken-identify-a-cabinet-card
- University of Washington Libraries, Special Collections (Nicolette Bromberg), Dating photographs by format and technology: content.lib.washington.edu/imls/kcsnapshots/documents/DatingPhotos.pdf
- National Library of Australia, Finding and dating photographs: library.gov.au/learn/adults/lifelong-learning/finding-and-dating-photographs
- Kodak, Photography history: kodak.com/en/company/page/photography-history
- Gawain Weaver and Zach Long, Chromogenic Characterization: A Study of Kodak Color Prints, 1942-2008, American Institute for Conservation: resources.culturalheritage.org/pmgtopics/2009-volume-thirteen/13_13_Weaver.html
- Science Museum Group, Kodak Instamatic 300 camera (126 cartridge, 28 x 28 mm): collection.sciencemuseumgroup.org.uk/objects/co8205390/instamatic-300-camera
- Science Museum Group, Model 95 Polaroid Land camera: collection.sciencemuseumgroup.org.uk/objects/co8001182/model-95-polaroid-land-camera
- LACMA, Polaroid SX-70 camera (1972): collections.lacma.org/object/255478
- FOMU, Directory of Belgian Photographers: fomu.atomis.be