How to Date Old Family Photographs
An undated photograph can be placed within a 5-10 year window using clothing styles, mount type, and photographer details. Here is how to date your family photos systematically.
Why dating photos matters
An undated portrait of a great-great-grandmother is interesting; the same portrait dated to within five years suddenly tells you which life event it commemorates - a wedding, a child's baptism, an emigration. Dating photos turns artefacts into evidence.
Three things together usually pin down a photo to within a 5-year window: the photo format, the clothing, and the photographer's mark.
Step 1: Identify the photo format
Photo formats followed clear technological eras:
- Daguerreotype (1839-1860): mirror-like image on a polished silver plate, in a hinged case.
- Ambrotype (1855-1865): image on glass, also cased.
- Tintype (1856-1900s): image on a thin iron sheet, often unmounted.
- Carte de visite (CDV) (1860-1880s): small albumen print mounted on card stock about 2.5 x 4 inches.
- Cabinet card (1866-1910): larger mount, about 4.25 x 6.5 inches. Mount colour, edge style, and corner shape evolved through the period.
- Postcard portrait (1900-1930s): printed on postcard stock with stamp box on the reverse.
The stamp box style on Real Photo Postcards (RPPCs) is especially useful - "AZO" with four triangles pointing up dates to 1904-1918, for example.
Step 2: Read the clothing
Women's fashions changed every 5-10 years and are the most reliable dating clue:
- 1860s: bell-shaped crinoline skirts, centre-parted hair.
- 1870s: bustles, draped overskirts, high collars.
- 1880s: pronounced bustles, then narrow skirts; tight-fitting bodices.
- 1890s: leg-of-mutton sleeves (huge at shoulder), high collars.
- 1900s (Edwardian): S-bend corsets, lace-trimmed blouses, large brimmed hats.
- 1910s: narrower silhouette, hobble skirts, rising hemlines from 1915.
- 1920s: dropped waists, shorter hair (bobs), shorter hemlines.
Men's clothing changed more slowly but collar styles, lapel widths, and hat types all give clues.
Step 3: Research the photographer
Most CDVs and cabinet cards have the photographer's name and city printed on the front or back of the mount. Trade directories, local newspapers, and census records can pin down the years a particular studio operated at a particular address.
If the studio existed only from 1885-1893, the photo must date to that window - regardless of what the clothing suggests. Photographers often stayed in business for decades, but address changes give tighter dates.
Step 4: Cross-reference with your family tree
Once you have a date window, open GEDminer and look at the candidate ancestors who would have been the right age in that window.
Use the Inline Person Preview to check life events - if your photo shows a young woman around 1885, and you have one female relative who was 22 in 1885 and another who was 60, the choice is obvious. Combine date estimates with Upcoming Events (births, marriages) to suggest what the photo might commemorate.
Step 5: Record what you learn
When you identify a photo, add the date and subject to the source record in your main genealogy software. Re-export the GEDCOM and re-upload to GEDminer - the new evidence will improve your Tree Health Score (Sourcing component) and may unlock new research suggestions.
Always note your reasoning ("dated 1885-1890 based on cabinet card mount style and leg-of-mutton sleeves") so future researchers can evaluate the evidence.