@timestamp filter missing in Kibana time filter field

[rajdevworks]

Kibana 6.8.12 management

Logs are ingested using curl

curl -v -XPOST 'http://localhost:9200/missing1/_doc/_bulk?pretty' -H 'Content-Type: application/json' --data-binary @missing

Why is @timestamp missing in the list of time filter field while creating the index pattern?
How can it be added so that visualization can be done properly?

[leandrojmp (Leandro Pereira)]

Do you have a @timestamp field in your document?

Elasticsearch does not create a @timestamp field, you will only have this field if it exists in your document or you send your logs to logstash before sending to elasticsearch, logstash adds a @timestamp field to the documents.