diff --git a/calendar/Makefile b/calendar/Makefile
new file mode 100755
index 0000000..7c5e6a7
--- /dev/null
+++ b/calendar/Makefile
@@ -0,0 +1,23 @@
+################################################################################
+#
+# File: $Id$
+#
+################################################################################
+
+SHELL = /bin/sh
+
+# Depending on the permissions of your TEXMF directory, you may need to
+# do a 'sudo make install'
+
+# Set this to whatever it should be, e.g., /usr/local/texmf or whatever.
+# Probably better to install these in your own personal TEXMF tree so that
+# they don't get wiped out by updates.
+# TEXMFHOME =
+LATEX = $(TEXMFHOME)/tex/latex
+
+
+install:
+	@mkdir -p $(LATEX)/local
+	php generate_calendar.php > $(LATEX)/local/calendar_weeks.tex
+
+	@texhash