Elasticsearch date parsing issue with default format

I am having a problem to parse some dates in elasticsearch. I have posted about the problem in stackoverflow. Please help me on this as i also could have some yyyy-mm-dd format dates along with epoch.

Thank you,


It'd be better to post here the question instead of a link to another website.
That way the question and the answers will be searchable.


Hi dadoonet,

Thank you for notifying me. I will explain the problem here.

My es version is 7.5.1.

I created an index 'abc':
curl -XPUT localhost:9200/abc

Now my mapping is:
curl -XPUT "localhost:9200/abc/_mapping" -H 'Content-Type:application/json' -d'
"properties": {
"memberDOB": {
"type": "date"

As per this link,


it says:
Date formats can be customised, but if no format is specified then it uses the default: "strict_date_optional_time||epoch_millis"

So I didn't mention any format explicitly.

for inserting the date1: '1969-11-19'
curl -XPOST "localhost:9200/abc/_doc" -H 'Content-Type: application/json' -d'
"memberDOB" : -3715200000

It gives me error:
{"error":{"root_cause":[{"type":"mapper_parsing_exception","reason":"failed to parse field [memberDOB] of type [date] in document with id 'Z7or5m8BpAMrohtXunLI'.
Preview of field's value: '-3715200000'"}],"type":"mapper_parsing_exception","reason":"failed to parse field [memberDOB] of type [date] in document with id
'Z7or5m8BpAMrohtXunLI'. Preview of field's value: '-3715200000'","caused_by":{"type":"date_time_exception","reason":"Invalid value for Year (valid values -999999999 - 999999999): -3715200000"}},"status":400}

From the mentioned exception, it seems that the epoch date is being treated as yyyy-mm-dd format.

for date2: '1965-10-11'
curl -XPOST "localhost:9200/abc/_doc" -H 'Content-Type: application/json' -d'
"memberDOB" : -133335000000
It works fine.

Also for date3 in yyyy-mm-dd format:
curl -XPOST "localhost:9200/abc/_doc" -H 'Content-Type: application/json' -d'
"memberDOB" : "2001-11-12"
It works fine.

I also updated the format as "format":"strict_date_optional_time||epoch_millis" in new index and tried to write, but still same error occurs for date1(-3715200000).

But when I update the format as "format":"epoch_millis", it works.

Could you please explain why this is happening or what am I missing here (for default format)?

Thank you, :slight_smile:

Please format your code, logs or configuration files using </> icon as explained in this guide and not the citation button. It will make your post more readable.

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Please update your post.

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