# Use the log time and date in the timestamp
**URL:** https://discuss.elastic.co/t/use-the-log-time-and-date-in-the-timestamp/213223
**Category:** Logstash
**Created:** [December 27, 2019, 6:57pm UTC](https://discuss.elastic.co/t/use-the-log-time-and-date-in-the-timestamp/213223 "2019-12-27T18:57:45Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Daniel\_Calisto](https://discuss.elastic.co/u/Daniel_Calisto)
#### Post date: [December 27, 2019, 6:57pm UTC](https://discuss.elastic.co/t/use-the-log-time-and-date-in-the-timestamp/213223/1 "2019-12-27T18:57:46Z")
Hi, Im trying to use the date and time in the log as the timestamp in elastic.
this is part of the log
12/27/19 06:46:39
this is the grok and the date filter to use the log date and time to use in the timestamp
grok{
match =\> {"message" =\> "%{DATA:date} %{TIME:time}"}
}
```
date {
match => ["date time", "MM/dd/yy HH:mm:ss"]
target => "@timestamp"
}
```
how can I achieve this?
---
### Author:  [@Badger](https://discuss.elastic.co/u/Badger)
#### Post date: [December 28, 2019, 12:38am UTC](https://discuss.elastic.co/t/use-the-log-time-and-date-in-the-timestamp/213223/2 "2019-12-28T00:38:45Z")
Use mutate+add\_field with sprintf references to combine date and time into a single field, or else use the pattern definitions option on the grok filter to define a pattern that combines "%{DATE} %{TIME}".
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [January 25, 2020, 12:38am UTC](https://discuss.elastic.co/t/use-the-log-time-and-date-in-the-timestamp/213223/3 "2020-01-25T00:38:47Z")
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