--- a/util/datetime.lua	Mon Aug 10 22:16:05 2015 +0200
+++ b/util/datetime.lua	Sat Feb 21 10:36:37 2015 +0100
@@ -15,25 +15,25 @@
 local error = error;
 local tonumber = tonumber;
 
-module "datetime"
+local _ENV = nil;
 
-function date(t)
+local function date(t)
 	return os_date("!%Y-%m-%d", t);
 end
 
-function datetime(t)
+local function datetime(t)
 	return os_date("!%Y-%m-%dT%H:%M:%SZ", t);
 end
 
-function time(t)
+local function time(t)
 	return os_date("!%H:%M:%S", t);
 end
 
-function legacy(t)
+local function legacy(t)
 	return os_date("!%Y%m%dT%H:%M:%S", t);
 end
 
-function parse(s)
+local function parse(s)
 	if s then
 		local year, month, day, hour, min, sec, tzd;
 		year, month, day, hour, min, sec, tzd = s:match("^(%d%d%d%d)%-?(%d%d)%-?(%d%d)T(%d%d):(%d%d):(%d%d)%.?%d*([Z+%-]?.*)$");
@@ -54,4 +54,10 @@
 	end
 end
 
-return _M;
+return {
+	date     = date;
+	datetime = datetime;
+	time     = time;
+	legacy   = legacy;
+	parse    = parse;
+};