Timezone issue in ingesting a document

[Gauti (Gautham)]

Hi All,

I am ingesting documents into ELK using logstash http_poller plugin, there is a static field i have added as "default_date" and the value for this date field i had mentioned as "01-01-1970 00:00:00"

default_date : 01-01-1970 00:00:00

here is my logstash filter

mutate { add_field => { "default_date" => "01-01-1970 00:00:00" } }
 date { match => ["[default_date]", "MM-dd-yyyy HH:mm:ss"]

this value is been used for calculating one of the time difference value for us.

The problem is when this is getting into elasticsearch the value changes as "01-01-1970 00:05:30"

default_date : 01.01.1970 00:05:30

Additional 05:30 is getting added, how can i get rid of this, because for my calculation the time should be 00:00:00

Any advice please.

Thanks
Gautham