diff --git a/changelogs/fragments/1077-s3_lifecycle-transition-days-zero.yml b/changelogs/fragments/1077-s3_lifecycle-transition-days-zero.yml
new file mode 100644
index 00000000000..cdef5072d6b
--- /dev/null
+++ b/changelogs/fragments/1077-s3_lifecycle-transition-days-zero.yml
@@ -0,0 +1,2 @@
+bugfixes:
+  - s3_lifecycle - add support of value *0* for ``transition_days`` (https://github.com/ansible-collections/community.aws/pull/1077).
diff --git a/plugins/modules/s3_lifecycle.py b/plugins/modules/s3_lifecycle.py
index c12ce6b0897..3f0bd784cef 100644
--- a/plugins/modules/s3_lifecycle.py
+++ b/plugins/modules/s3_lifecycle.py
@@ -314,7 +314,7 @@ def build_rule(client, module):
             t_out = dict()
             if transition.get('transition_date'):
                 t_out['Date'] = transition['transition_date']
-            elif transition.get('transition_days'):
+            elif transition.get('transition_days') is not None:
                 t_out['Days'] = transition['transition_days']
             if transition.get('storage_class'):
                 t_out['StorageClass'] = transition['storage_class'].upper()
@@ -596,7 +596,7 @@ def main():
                                  'noncurrent_version_transition_days',
                                  'noncurrent_version_transitions')
         for param in required_when_present:
-            if module.params.get(param):
+            if module.params.get(param) is None:
                 break
         else:
             msg = "one of the following is required when 'state' is 'present': %s" % ', '.join(required_when_present)
diff --git a/tests/integration/targets/s3_lifecycle/tasks/main.yml b/tests/integration/targets/s3_lifecycle/tasks/main.yml
index 566a8381c19..67871545bda 100644
--- a/tests/integration/targets/s3_lifecycle/tasks/main.yml
+++ b/tests/integration/targets/s3_lifecycle/tasks/main.yml
@@ -180,6 +180,30 @@
         prefix: /something
       register: output
 
+    - assert:
+        that:
+          - output is not changed
+  # ============================================================
+    - name: Create a lifecycle policy, with glacier and transition_days to 0
+      s3_lifecycle:
+        name: '{{ bucket_name }}'
+        transition_days: 0
+        storage_class: glacier
+        prefix: /something
+      register: output
+
+    - assert:
+        that:
+          - output is changed
+  # ============================================================
+    - name: Create a lifecycle policy, with glacier and transition_days to 0 (idempotency)
+      s3_lifecycle:
+        name: '{{ bucket_name }}'
+        transition_days: 0
+        storage_class: glacier
+        prefix: /something
+      register: output
+
     - assert:
         that:
           - output is not changed