Index: doc/Makefile.am
===================================================================
--- doc/Makefile.am
+++ doc/Makefile.am
@@ -28,6 +28,9 @@
 
 YAT2M_OPTIONS = -I $(srcdir) \
 	--release "Libgpg-error @PACKAGE_VERSION@" --source "GnuPG"
+ifdef SOURCE_DATE_EPOCH
+	YAT2M_OPTIONS += --date $(SOURCE_DATE_EPOCH)
+endif
 
 myman_sources = gpgrt.texi
 myman_pages   = gpg-error-config.1