diff --git a/setup_docs.py b/setup_docs.py
index 3c21a17c1..8188bc77f 100644
--- a/setup_docs.py
+++ b/setup_docs.py
@@ -7,6 +7,7 @@
 import textwrap
 from collections import OrderedDict
 from datetime import datetime
+import time
 
 from setuptools import Command
 
@@ -470,7 +471,10 @@ def write_man_header(self, write, title, description):
         self.write_heading(write, description, double_sided=True)
         # man page metadata
         write(":Author: The Borg Collective")
-        write(":Date:", datetime.utcnow().date().isoformat())
+        write(
+            ":Date:",
+            datetime.utcfromtimestamp(int(os.environ.get("SOURCE_DATE_EPOCH", time.time()))).date().isoformat(),
+        )
         write(":Manual section: 1")
         write(":Manual group: borg backup tool")
         write()