diff --git a/src/main/java/com/elastic/support/diagnostics/commands/GenerateManifestCmd.java b/src/main/java/com/elastic/support/diagnostics/commands/GenerateManifestCmd.java
index 75582a02..c28f27e8 100644
--- a/src/main/java/com/elastic/support/diagnostics/commands/GenerateManifestCmd.java
+++ b/src/main/java/com/elastic/support/diagnostics/commands/GenerateManifestCmd.java
@@ -41,7 +41,7 @@ public void execute(DiagnosticContext context) {
          manifest.put(Constants.DIAG_VERSION, diagVersion);
 
          context.setDiagVersion(diagVersion);
-         manifest.put("collectionDate", SystemProperties.getUtcDateString());
+         manifest.put("collectionDate", SystemProperties.getUtcDateTimeString());
 
          DiagnosticInputs params = context.getDiagnosticInputs();
          manifest.put("diagnosticInputs", params.toString());