From: Georges Khaznadar <georgesk@debian.org>
Date: Sun, 5 Oct 2025 20:50:36 +0200
Subject: Enable reproducible building

- Remove timestamp from documentation
- When generating PDF files, honour SOURCE_DATE_EPOCH for timestamps in
  metadata: https://reproducible-builds.org/specs/source-date-epoch/
- Interpret timestamps in generated PDF files as UTC.
---
 docs/userguide/ch1_intro.py     | 1 -
 src/reportlab/pdfbase/pdfdoc.py | 4 ++--
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/docs/userguide/ch1_intro.py b/docs/userguide/ch1_intro.py
index bd549ab..754efcd 100644
--- a/docs/userguide/ch1_intro.py
+++ b/docs/userguide/ch1_intro.py
@@ -9,7 +9,6 @@ from reportlab.lib.utils import TimeStamp
 title("ReportLab PDF Library")
 title("User Guide")
 centred('ReportLab Version ' + reportlab.Version)
-centred(TimeStamp().datetime.strftime('Document generated on %Y/%m/%d %H:%M:%S %Z'))
 
 nextTemplate("TOC")
 
diff --git a/src/reportlab/pdfbase/pdfdoc.py b/src/reportlab/pdfbase/pdfdoc.py
index 4c61768..7475e78 100755
--- a/src/reportlab/pdfbase/pdfdoc.py
+++ b/src/reportlab/pdfbase/pdfdoc.py
@@ -1767,8 +1767,8 @@ class PDFDate(PDFObject):
     def format(self, doc):
         dfmt = self.dateFormatter or (
                 lambda yyyy,mm,dd,hh,m,s:
-                    "D:%04d%02d%02d%02d%02d%02d%+03d'%02d'"
-                        % (yyyy,mm,dd,hh,m,s,self.dhh,self.dmm))
+                    "D:%04d%02d%02d%02d%02d%02d+00'00'"
+                        % (yyyy,mm,dd,hh,m,s))
         return format(PDFString(dfmt(*self.date)), doc)
 
 class Destination(PDFObject):
