Fix broken 0.4 compat

init.lua

@@ -1,4 +1,26 @@
-local S = minetest.get_translator("calendar_node")
+local S
+-- Compability translator code to support MT 0.4, which doesn't support
+-- translations for mods.
+if not minetest.translate then
+	-- No translation system available, use dummy functions
+	local function translate(textdomain, str, ...)
+		local arg = {n=select('#', ...), ...}
+		return str:gsub("@(.)", function(matched)
+			local c = string.byte(matched)
+			if string.byte("1") <= c and c <= string.byte("9") then
+				return arg[c - string.byte("0")]
+			else
+				return matched
+			end
+		end)
+	end
+
+	S = function(str, ...)
+		return translate("calendar_node", str, ...)
+	end
+else
+	S = minetest.get_translator("calendar_node")
+end
 
 local on_rightclick
 if minetest.get_modpath("calendar") then