diff --git a/src/commands/DeltaCommand.ts b/src/commands/DeltaCommand.ts
index 3bacee8..02d1cf3 100644
--- a/src/commands/DeltaCommand.ts
+++ b/src/commands/DeltaCommand.ts
@@ -48,7 +48,7 @@ export class DeltaCommand extends GenericCommand {
       deltaFs.writeCves(undefined, `${deltaFilename}.zip`);
       deltaFs.writeTextFile(`release_notes.md`);
     } else {
-      const timestamp = new Date();
+      const timestamp = new Date(options.start);
       const delta = await Git.newDeltaFromGitHistory(options.start);
       // console.log(`delta=${JSON.stringify(delta, null, 2)}`);
       console.log(delta.toText());