diff --git a/vlib/time/time.v b/vlib/time/time.v
index 30b56dcdde..82eec3345c 100644
--- a/vlib/time/time.v
+++ b/vlib/time/time.v
@@ -366,9 +366,14 @@ pub fn (t Time) relative() string {
 }
 
 pub fn day_of_week(y, m, d int) int {
-	// TODO please no
-	//# return  (d += m < 3 ? y-- : y - 2, 23*m/9 + d + 4 + y/4- y/100 + y/400)%7;
-	return 0
+	// Sakomotho's algorithm is explained here: 
+	// https://stackoverflow.com/a/6385934
+	t := [0, 3, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4]
+	mut sy := y 
+	if (m < 3) {
+		sy = sy - 1
+	}
+    return ( sy + sy/4 - sy/100 + sy/400 + t[m-1] + d - 1) % 7 + 1
 }
 
 pub fn (t Time) day_of_week() int {