Values for the Timestamp type are encoded as 64-bit signed integers representing a number of milliseconds since the standard base time known as the epoch: January 1 1970 at 00:00:00 GMT. A Timestamp type can be entered as an integer for CQL input, or as a string literals in any of the following ISO 8601 formats:
yyyy-mm-dd HH:mm yyyy-mm-dd HH:mm:ss yyyy-mm-dd HH:mmZ yyyy-mm-dd HH:mm:ssZ yyyy-mm-dd'T'HH:mm yyyy-mm-dd'T'HH:mmZ yyyy-mm-dd'T'HH:mm:ss yyyy-mm-dd'T'HH:mm:ssZ yyyy-mm-dd yyyy-mm-ddZ
where Z is the RFC-822 4-digit time zone, expressing the time zone's difference from UTC. For example, for the date and time of Jan 2, 2003, at 04:05:00 AM, GMT:
2011-02-03 04:05+0000 2011-02-03 04:05:00+0000 2011-02-03T04:05+0000 2011-02-03T04:05:00+0000
If no time zone is specified, the time zone of the Cassandra coordinator node handing the write request is used. For accuracy, DataStax recommends specifying the time zone rather than relying on the time zone configured on the Cassandra nodes.
If you only want to capture date values, the time of day can also be omitted. For example:
In this case, the time of day defaults to 00:00:00 in the specified or default time zone.Timestamp output appears in the following format by default:
You can change the format by setting the time_format property in the [ui] section of the cqlshrc file.