diff --git a/stable/fluent-bit/Chart.yaml b/stable/fluent-bit/Chart.yaml
index 0a3e526e6c..1f4ed234aa 100755
--- a/stable/fluent-bit/Chart.yaml
+++ b/stable/fluent-bit/Chart.yaml
@@ -1,6 +1,6 @@
 apiVersion: v1
 name: fluent-bit
-version: 2.8.14
+version: 2.8.15
 appVersion: 1.3.7
 description: Fast and Lightweight Log/Data Forwarder for Linux, BSD and OSX
 keywords:
diff --git a/stable/fluent-bit/README.md b/stable/fluent-bit/README.md
index ffeb70e4c8..c931b75106 100644
--- a/stable/fluent-bit/README.md
+++ b/stable/fluent-bit/README.md
@@ -48,6 +48,7 @@ The following table lists the configurable parameters of the Fluent-Bit chart an
 | `backend.es.logstash_format`          | Enable Logstash format compatibility. | `On` |
 | `backend.es.logstash_prefix`  | Index Prefix. If Logstash_Prefix is equal to 'mydata' your index will become 'mydata-YYYY.MM.DD'. | `kubernetes_cluster` |
 | `backend.es.logstash_prefix_key`  | Index Prefix key. When included, the value in the record that belongs to the key will be looked up and overwrite `Logstash_Prefix` for index generation. If `Logstash_Prefix_Key` = 'mydata' the index becomes 'mydata-YYYY.MM.DD'. | `` |
+| `backend.es.logstash_dateformat`  | Time format (based on strftime) to generate the second part of the Index name. Fluent-bit by default use %Y.%m.%d | `` |
 | `backend.es.replace_dots`     | Enable/Disable Replace_Dots option. | `On` |
 | `backend.es.http_user`        | Optional username credential for Elastic X-Pack access. | `` |
 | `backend.es.http_passwd`      | Password for user defined in HTTP_User. | `` |
diff --git a/stable/fluent-bit/templates/config.yaml b/stable/fluent-bit/templates/config.yaml
index 37bba568fd..174cf50666 100644
--- a/stable/fluent-bit/templates/config.yaml
+++ b/stable/fluent-bit/templates/config.yaml
@@ -141,6 +141,9 @@ data:
 {{- if .Values.backend.es.logstash_prefix_key }}
         Logstash_Prefix_Key {{ .Values.backend.es.logstash_prefix_key }}
 {{- end }}
+{{- if .Values.backend.es.logstash_dateformat }}
+        Logstash_DateFormat {{ .Values.backend.es.logstash_dateformat }}
+{{- end }}
 {{ else if .Values.backend.es.index }}
         Index {{ .Values.backend.es.index }}
 {{- end }}