also: タイム・スタンプ
timestamp
A digital or physical mark indicating the date and time of an event, record, or file.
If you look at the email's timestamp, you can tell when it was sent.
time-stamping machine
A device that prints the current time on a document or card, such as a time clock used for attendance.
Please stamp a timestamp on this document.
When I arrive at the office, I record my start time with the time-stamping machine.
The timestamp is displayed in the file's properties.
I checked the timestamp on the email.
The system automatically retrieves a timestamp.
Employees record their clock-in time using the time-stamping machine.
Borrowed from English 'timestamp'.