Journal · Amsterdam · 2026-09-02
Half Ten Means Two Different Hours
In British English, half ten is half past ten. In Dutch, half tien is half past nine. Two guests used the same two words and meant hours sixty minutes apart.
Some words are dangerous because they look the same in two languages. Half ten is one of them. It appears in messages more often than you might expect, and it does not mean the same thing to everyone who reads it.
Two meanings of one phrase
In British English, especially in speech, half ten is short for half past ten. It is 10:30. An English guest who writes half ten means half an hour after ten.
In Dutch, the phrase half tien means half an hour before ten. It is 9:30. German works the same way: halb zehn is 9:30. So do several other languages in the north and east of Europe. A speaker of one of these languages who writes half ten, translating word for word, means half an hour before ten.
So the same two words can mean 10:30 or 9:30. That is a full hour apart, and it depends on where the writer learned to tell the time.
How it showed up
A message arrived asking for half ten. The guest had a name that could have come from almost anywhere, and wrote in careful, simple English. The reply did not know which half ten was meant, and did not guess. It asked: 09:30 or 10:30? And then, because it was a booking for the evening: 21:30 or 22:30?
The guest answered 21:30. They had learned to count the half hour towards the next hour. If the reply had assumed the British meaning, she would have arrived an hour after the time the guest had in mind.
Why a translation app does not help here
You might think a translation app would fix this. Often it does not. Many apps translate half tien as half ten, word for word, because that is what the words say. The meaning is lost on the way. Some apps translate it correctly, as half past nine. You cannot be sure which one you have. The page on booking with a translation app explains other places where an app changes a number without warning.
The fix is a colon
There is a simple answer, and it is the same answer every time. Write the time in digits, with a colon: 21:30. Digits do not belong to any language. A colon between the hour and the minutes cannot be counted in two directions. Whatever your first words for time are, 21:30 reads the same to everyone.
Quarter words have the same problem, by the way. In Dutch, kwart voor tien is a quarter to ten, which is easy. But some languages count quarters in other ways too, and a quarter past can become three quarters of something. Write 21:15 and 21:45, and the quarter problem goes away as well.
Why this matters more at night
In the evening, an hour is a long time. A guest waiting at 21:30 for a knock that is planned for 22:30 spends an hour wondering. A guest who expects someone at 22:30 and hears the knock at 21:30 may still be out. Neither is a disaster, but both are an evening that started badly. And with the booking rules, a mistake about the hour can also affect what a change costs, because notice is counted from the booked hour.
A small list of phrases to avoid
If English is your second language, or the language you grew up with counts time in its own way, it helps to avoid a few phrases completely in a booking message:
- half followed by an hour, such as half ten;
- quarter, in any form;
- tonight, when the message may be read after midnight;
- tomorrow, for the same reason;
- in the evening, without an hour.
Use digits with a colon, and a date with the month in letters. It feels less natural at first. After one message it feels normal, and after two it feels safer.
The same care in the reply
Every hour in a reply here is written in digits, on the twenty-four hour clock, in Amsterdam time. You will not see half ten in a reply, or a quarter past. If you read a reply and the hour looks unexpected, write it back and ask. A question takes a few seconds, while a misread hour takes the whole evening. The guide to hours and dates has a table of every evening and night hour, in both clocks.