diff --git a/ANNOUNCE b/ANNOUNCE
index 26550b34b..b902d7b38 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
 
-Libpng 1.5.28beta01 - October 30, 2016
+Libpng 1.5.28beta01 - December 27, 2016
 
 This is not intended to be a public release.  It will be replaced
 within a few weeks by a public version or by another test version.
@@ -26,7 +26,7 @@ Other information:
 
 Changes since the last public release (1.5.27):
 
-version 1.5.28beta01 [October 30, 2016]
+version 1.5.28beta01 [December 27, 2016]
   Merged with current libpng16 gregbook, pngvalid.c, pngtest.c, pngminim,
     pngminus
   Fixed undefined behavior in png_push_save_buffer(). Do not call
diff --git a/CHANGES b/CHANGES
index 2457cd82f..c358afbaf 100644
--- a/CHANGES
+++ b/CHANGES
@@ -4496,7 +4496,7 @@ version 1.5.27rc01 [May 14, 2016]
 version 1.5.27 [May 26, 2016]
   No changes.
 
-version 1.5.28beta01 [October 30, 2016]
+version 1.5.28beta01 [December 27, 2016]
   Merged with current libpng16 gregbook, pngvalid.c, pngtest.c, pngminim,
     pngminus
   Fixed undefined behavior in png_push_save_buffer(). Do not call
diff --git a/png.c b/png.c
index cb6708f3a..6922200ac 100644
--- a/png.c
+++ b/png.c
@@ -1,8 +1,8 @@
 
 /* png.c - location for general purpose libpng functions
  *
- * Last changed in libpng 1.5.23 [July 23, 2015]
- * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.28 [(PENDING RELEASE)]
+ * Copyright (c) 1998-2002,2004,2006-2016 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  *
@@ -655,14 +655,14 @@ png_get_copyright(png_const_structp png_ptr)
 #else
 #  ifdef __STDC__
    return PNG_STRING_NEWLINE \
-     "libpng version 1.5.28beta01 - May 29, 2016" PNG_STRING_NEWLINE \
+     "libpng version 1.5.28beta01 - December 27, 2016" PNG_STRING_NEWLINE \
      "Copyright (c) 1998-2002,2004,2006-2016 Glenn Randers-Pehrson" \
      PNG_STRING_NEWLINE \
      "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
      "Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
      PNG_STRING_NEWLINE;
 #  else
-      return "libpng version 1.5.28beta01 - May 29, 2016\
+      return "libpng version 1.5.28beta01 - December 27, 2016\
       Copyright (c) 1998-2002,2004,2006-2016 Glenn Randers-Pehrson\
       Copyright (c) 1996-1997 Andreas Dilger\
       Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.";