init.lua

local second = tonumber(os.date("%S"))
local minute = tonumber(os.date("%M"))

--Inside the node
	on_construct = function(pos, itemstack, pointed_thing)
		local meta = minetest.get_meta(pos)
		if second > 10 then
			meta:set_int("next_min", minute + 1)
			minetest.log("none", "second is " ..second.. " which is greater than 10, setting fill date to next minute (" .. minute + 1 ..") from current minute (" .. minute .. ")")
		elseif second <= 10 then
			meta:set_int("next_min", minute)
			minetest.log("none", "second is " ..second.. " which is less than 10, setting fill date to current minute (" .. minute ..")")
		end
	end,