diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 02fd6f6..12936cc 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -155,6 +155,12 @@ Then run all tests:
 ```shell
 go test ./... -tags=integration
 ```
+> [!NOTE]
+> If you have issues with tests not passing, it might be related to timezones. The `test_postgres` container runs in timezone UTC.  If your host is not configured in timezone UTC, then the tests will fail.  To configure an Ubuntu host, execute:
+> 
+> ```shell
+> sudo timedatectl set-timezone Etc/UTC
+> ```
 
 ## Build Docker image
 
@@ -186,4 +192,3 @@ go run test/mockindexer/main.go
 * Go to Settings -> IRC and toggle the IRC network `Mock Indexer`
 * Add a new Filter or add the indexer to an existing filter
 * Open a new tab and navigate to [http://localhost:3999](http://localhost:3999) and put the example announce in the input then hit enter
-