diff --git a/LICENSE b/LICENSE
index 59f4f27..8d73051 100644
--- a/LICENSE
+++ b/LICENSE
@@ -10,7 +10,7 @@
 
 This code is released under the libpng license.
 
-libpng versions 1.2.6, August 15, 2004, through 1.7.0beta46, January 1, 2015, are
+libpng versions 1.2.6, August 15, 2004, through 1.7.0beta46, January 2, 2015, are
 Copyright (c) 2004, 2006-2014 Glenn Randers-Pehrson, and are
 distributed according to the same disclaimer and license as libpng-1.2.5
 with the following individual added to the list of Contributing Authors
@@ -108,4 +108,4 @@
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-January 1, 2015
+January 2, 2015
diff --git a/README b/README
index fa79bc3..c443e7d 100644
--- a/README
+++ b/README
@@ -1,4 +1,4 @@
-README for libpng version 1.7.0beta46 - January 1, 2015 (shared library 17.0)
+README for libpng version 1.7.0beta46 - January 2, 2015 (shared library 17.0)
 See the note about version numbers near the top of png.h
 
 See INSTALL for instructions on how to install libpng.
diff --git a/libpng-manual.txt b/libpng-manual.txt
index fb5ab50..7166433 100644
--- a/libpng-manual.txt
+++ b/libpng-manual.txt
@@ -5147,6 +5147,10 @@
     #  endif
     #endif
 
+The png_get_IHDR() function now allows users to supply NULL for any
+argument in which they aren't interested.  Previously, the width, height,
+bit_depth, and color_type arguments were not allowed to be NULL.
+
 The 8-bit compose and rgb_to_grayscale operations were made more accurate.
 While these did not introduce API incompatibility, there may be differences
 in unit test results.
diff --git a/libpng.3 b/libpng.3
index a0eb43a..7ae6722 100644
--- a/libpng.3
+++ b/libpng.3
@@ -5641,6 +5641,10 @@
     #  endif
     #endif
 
+The png_get_IHDR() function now allows users to supply NULL for any
+argument in which they aren't interested.  Previously, the width, height,
+bit_depth, and color_type arguments were not allowed to be NULL.
+
 The 8-bit compose and rgb_to_grayscale operations were made more accurate.
 While these did not introduce API incompatibility, there may be differences
 in unit test results.
diff --git a/libpngpf.3 b/libpngpf.3
index 9c73502..d873a79 100644
--- a/libpngpf.3
+++ b/libpngpf.3
@@ -1,4 +1,4 @@
-.TH LIBPNGPF 3 "January 1, 2015"
+.TH LIBPNGPF 3 "January 2, 2015"
 .SH NAME
 libpng \- Portable Network Graphics (PNG) Reference Library 1.7.0beta46
 (private functions)
diff --git a/png.5 b/png.5
index c569e9e..41b64ad 100644
--- a/png.5
+++ b/png.5
@@ -1,4 +1,4 @@
-.TH PNG 5 "January 1, 2015"
+.TH PNG 5 "January 2, 2015"
 .SH NAME
 png \- Portable Network Graphics (PNG) format
 .SH DESCRIPTION
diff --git a/png.c b/png.c
index 9599d6b..c84b4ef 100644
--- a/png.c
+++ b/png.c
@@ -691,13 +691,13 @@
 #else
 #  ifdef __STDC__
    return PNG_STRING_NEWLINE \
-     "libpng version 1.7.0beta46 - January 1, 2015" PNG_STRING_NEWLINE \
+     "libpng version 1.7.0beta46 - January 2, 2015" PNG_STRING_NEWLINE \
      "Copyright (c) 1998-2015 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 1.7.0beta46 - January 1, 2015\
+      return "libpng version 1.7.0beta46 - January 2, 2015\
       Copyright (c) 1998-2015 Glenn Randers-Pehrson\
       Copyright (c) 1996-1997 Andreas Dilger\
       Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.";
diff --git a/png.h b/png.h
index db1b3be..5da3729 100644
--- a/png.h
+++ b/png.h
@@ -1,7 +1,7 @@
 
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.7.0beta46 - January 1, 2015
+ * libpng version 1.7.0beta46 - January 2, 2015
  * Copyright (c) 1998-2015 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.)
@@ -11,7 +11,7 @@
  * Authors and maintainers:
  *   libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
  *   libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
- *   libpng versions 0.97, January 1998, through 1.7.0beta46 - January 1, 2015: Glenn
+ *   libpng versions 0.97, January 1998, through 1.7.0beta46 - January 2, 2015: Glenn
  *   See also "Contributing Authors", below.
  *
  * Note about libpng version numbers:
@@ -200,7 +200,7 @@
  *
  * This code is released under the libpng license.
  *
- * libpng versions 1.2.6, August 15, 2004, through 1.7.0beta46, January 1, 2015, are
+ * libpng versions 1.2.6, August 15, 2004, through 1.7.0beta46, January 2, 2015, are
  * Copyright (c) 2004, 2006-2013 Glenn Randers-Pehrson, and are
  * distributed according to the same disclaimer and license as libpng-1.2.5
  * with the following individual added to the list of Contributing Authors:
@@ -312,7 +312,7 @@
  * Y2K compliance in libpng:
  * =========================
  *
- *    January 1, 2015
+ *    January 2, 2015
  *
  *    Since the PNG Development group is an ad-hoc body, we can't make
  *    an official declaration.
@@ -382,7 +382,7 @@
 /* Version information for png.h - this should match the version in png.c */
 #define PNG_LIBPNG_VER_STRING "1.7.0beta46"
 #define PNG_HEADER_VERSION_STRING \
-     " libpng version 1.7.0beta46 - January 1, 2015\n"
+     " libpng version 1.7.0beta46 - January 2, 2015\n"
 
 #define PNG_LIBPNG_VER_SONUM   17
 #define PNG_LIBPNG_VER_DLLNUM  17
diff --git a/pngconf.h b/pngconf.h
index 136d401..d713cd0 100644
--- a/pngconf.h
+++ b/pngconf.h
@@ -1,7 +1,7 @@
 
 /* pngconf.h - machine configurable file for libpng
  *
- * libpng version 1.7.0beta46 - January 1, 2015
+ * libpng version 1.7.0beta46 - January 2, 2015
  *
  * Copyright (c) 1998-2015 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/projects/vstudio/readme.txt b/projects/vstudio/readme.txt
index 7be3a95..c69cf42 100644
--- a/projects/vstudio/readme.txt
+++ b/projects/vstudio/readme.txt
@@ -1,7 +1,7 @@
 
 VisualStudio instructions
 
-libpng version 1.7.0beta46 - January 1, 2015
+libpng version 1.7.0beta46 - January 2, 2015
 
 Copyright (c) 1998-2010 Glenn Randers-Pehrson
 
diff --git a/projects/vstudio/zlib.props b/projects/vstudio/zlib.props
index 21e34c2..2b3ce77 100644
--- a/projects/vstudio/zlib.props
+++ b/projects/vstudio/zlib.props
@@ -2,7 +2,7 @@
 <!--
  * zlib.props - location of zlib source
  *
- * libpng version 1.7.0beta46 - January 1, 2015
+ * libpng version 1.7.0beta46 - January 2, 2015
  *
  * Copyright (c) 1998-2011 Glenn Randers-Pehrson
  *
diff --git a/scripts/README.txt b/scripts/README.txt
index b66ec9a..3d52bc6 100644
--- a/scripts/README.txt
+++ b/scripts/README.txt
@@ -1,5 +1,5 @@
 
-Makefiles for  libpng version 1.7.0beta46 - January 1, 2015
+Makefiles for  libpng version 1.7.0beta46 - January 2, 2015
 
 pnglibconf.h.prebuilt       =>  Stores configuration settings
  makefile.linux    =>  Linux/ELF makefile
diff --git a/scripts/pnglibconf.h.prebuilt b/scripts/pnglibconf.h.prebuilt
index c917261..24652ed 100644
--- a/scripts/pnglibconf.h.prebuilt
+++ b/scripts/pnglibconf.h.prebuilt
@@ -2,7 +2,7 @@
 
 /* pnglibconf.h - library build configuration */
 
-/* Libpng version 1.7.0beta46 - January 1, 2015 */
+/* Libpng version 1.7.0beta46 - January 2, 2015 */
 
 /* Copyright (c) 1998-2014 Glenn Randers-Pehrson */