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`EXPIREAT` has the same effect and semantic as `EXPIRE`, but instead of
specifying the number of seconds representing the TTL (time to live), it takes
an absolute [Unix timestamp][hewowu] (seconds since January 1, 1970). A
timestamp in the past will delete the key immediately.
[hewowu]: http://en.wikipedia.org/wiki/Unix_time
Please for the specific semantics of the command refer to the documentation of
`EXPIRE`.
## Background
`EXPIREAT` was introduced in order to convert relative timeouts to absolute
timeouts for the AOF persistence mode. Of course, it can be used directly to
specify that a given key should expire at a given time in the future.
@return
@integer-reply, specifically:
- `1` if the timeout was set.
- `0` if `key` does not exist.
@examples
```cli
SET mykey "Hello"
EXISTS mykey
EXPIREAT mykey 1293840000
EXISTS mykey
```
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