Initial state

ts/date_functions.ts

@@ -0,0 +1,10 @@
+// function that receives two hours in hh:mm format and compares as a spaceship operator
+export function compareHours(h1: string, h2: string): number {
+    const [h1h, h1m] = h1.split(":").map(Number);
+    const [h2h, h2m] = h2.split(":").map(Number);
+    if (h1h > h2h) return 1;
+    if (h1h < h2h) return -1;
+    if (h1m > h2m) return 1;
+    if (h1m < h2m) return -1;
+    return 0;
+}