diff --git a/google-cloud-bigquery/src/main/java/com/google/cloud/bigquery/QueryParameterValue.java b/google-cloud-bigquery/src/main/java/com/google/cloud/bigquery/QueryParameterValue.java
index 900d04b4e..0487c3f7c 100644
--- a/google-cloud-bigquery/src/main/java/com/google/cloud/bigquery/QueryParameterValue.java
+++ b/google-cloud-bigquery/src/main/java/com/google/cloud/bigquery/QueryParameterValue.java
@@ -300,7 +300,12 @@ public static QueryParameterValue bytes(byte[] value) {
     return of(value, StandardSQLTypeName.BYTES);
   }
 
-  /** Creates a {@code QueryParameterValue} object with a type of TIMESTAMP. */
+  /**
+   * Creates a {@code QueryParameterValue} object with a type of TIMESTAMP.
+   *
+   * @param value Microseconds since epoch, e.g. 1733945416000000 corresponds to 2024-12-11
+   *     19:30:16.929Z
+   */
   public static QueryParameterValue timestamp(Long value) {
     return of(value, StandardSQLTypeName.TIMESTAMP);
   }