Dating

Nothing on the back.
Still a date.

Q: How do you date an old photograph with no date on it?

By reading the picture. A hat that was in fashion for six years, a car that was not sold before a certain year, a radio in the corner, handwriting on the reverse, or another photo in the same collection that carries a date. Phossil starts with every year on the table and lets each clue rule years out. What survives is the answer, and it arrives as a range with the most likely year inside it.

Q: What kind of evidence narrows the date?

Clothing and fashion, the era the whole picture reads as, technology visible in the room, a car model, an occasion such as a graduation, a season or a holiday, an inscription, writing on the back of the photo, the camera metadata when the file carries any, and a matching photo elsewhere in your collection. The people in the frame count too: a face whose age can be read against a birth date you have already given us is one of the sharpest clues in the pile.

Q: What will the dating not do?

It cannot read what is not in the picture. A plain sweater against a blank wall gives it almost nothing, and the range stays wide. A scan carries the date you scanned it, not the date it was taken, so that metadata is deliberately given no weight. It does not know your family unless you tell it, so birth dates and names sharpen it and their absence does not. And where it cannot pin a photo down, it says so instead of inventing a year.

The photograph remembers. The clothing, the hair, the paper it’s printed on. Phossil starts with every year on the table and lets each clue in the picture rule years out, so what comes back is a year with the range it sits inside.

Dating

A sample collection, one photo out of it. Yours is read the same way.

Sometime in the last century and a half

we couldn’t narrow it further

Rough guess

The clues we used:

Press one to put it on the table. The range closes as they stack up.

What you are looking at

Every year in a century and a half, before any clue lands
Each clue rules years out, and the shape closes around what is left
The bracket is the years the estimate covers
The band underneath moves as the evidence gets stronger

How do you date an old photograph with no date on it?

You read the picture. A hat that was in fashion for six years. A car that was not sold before a certain year, so the photo cannot be older than it. A radio in the corner of the room. Handwriting on the reverse. Another photo in the same collection, already dated, with the same christening gown in it.

Phossil begins with every year on the table and no preference among them, then lets each clue rule years out. One clue on its own rarely settles anything. Six of them, pulling in the same direction, close the century down to a handful of years. How the dating works.

Why does Phossil give a range instead of a year?

A range, not a single day. The evidence narrows it this far and no further, so we won’t pretend a date the photo doesn’t give.

So a photo carries two things at once. The most likely year, and the years around it the evidence still allows. In your collection they sit together: Around 1928 with Between 1926 and 1932 underneath it. Never a bare year on its own, because a bare year is a claim the picture did not make.

Underneath both sits one word for how much the evidence carried: Anchored, Estimated, or Rough guess. It reads as a shape and a word, not a color, so it survives a color-blind reader and a printed page. And a date you type in yourself always wins over anything we inferred: it turns Anchored, and photos that match it firm up around it.

What kind of evidence narrows the date?

Clothing and fashion. The era the whole picture reads as. Technology sitting in the room. A car model. An occasion such as a graduation. A season, or a holiday. An inscription. Writing on the back of the photo, which is why a scan of the reverse is worth the second tap. Camera metadata, on the rare old file that carries any. And a matching photo elsewhere in your collection, which lends its date to its neighbors.

The people in the frame count too. A face whose apparent age can be read against a birth date you have already given us is one of the sharpest clues in the pile, which is the quiet argument for naming faces early: every name you add sharpens dates on photos you have not looked at yet.

What will the dating not do?

It cannot read what is not in the picture. A plain sweater, a blank wall, a close crop with no room and no objects in it: there is nothing there to rule years out, and the range stays wide. That is the correct answer to that photo.

Some photos never come in. We couldn’t pin this one down, and we won’t pretend otherwise. That is a result you will meet, and it stays visible and correctable in your collection rather than quietly disappearing.

A scan carries the day you scanned it, not the day it was taken. Phossil spots that and gives the file’s own date no weight at all, which is why a print photographed today does not come back dated today.

And it does not know your family unless you tell it. Birth dates and names sharpen it considerably; without them it is reading the picture alone. A date you enter yourself is always the last word.

Do I keep what I paid for?

You buy a collection once. It is not a subscription, and nothing you have paid for is taken back from you later.

Downloading your photographs is never gated and never charged, in full resolution, whatever the state of your account. See pricing.

Back to what Phossil does. Dates are what the rest of it stands on: once photos know when they happened, they can be drawn through time.