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# Supported Log Event Timestamp Formats

One of the key things when working with time based data is the timestamp that represents the moment when the event was generated. Sematext Logs Management expects the time of the event to be provided in the @timestamp field. The following @timestamp value formats are currently supported by our logging management solution:

1. ISO date with timezone information, for example:

2016-06-22T10:00:00Z
2016-01-04T15:30:10.474+00:00
2016-01-04T15:30:10,474+00:00
2016-06-22T10:00:00.000Z
2016-06-22T10:00:00,000Z
2016-06-22T10:00:00Z
2016-06-22T10:00:00.298Z
2016-06-22T10:00:00.298

2. Timezone specified by using +/- notation, for example:

2014-03-23T22:04:23-0400

3. Default Log4j date and time format, for example:

2016-06-24 10:38:09,758
2016-06-24 10:38:09

4. Time since epoch, for example:

1466595234226

5. Graylog date format, for example:

1385053862.3072
1444128321.426
2015-11-13T09:21:45.298


• if @timestamp field is not provided Sematext will set @timestamp to the time when the event is received by Sematext.
• if time specified in@timestamp does not include timezone information, Logs App will assume UTC.