Initial commit

Load this up somewhere where I can setup CI/CD

src/app/lib/ordinalDate.ts

@@ -0,0 +1,15 @@
+
+export const ordinalToDate = (ordinal: number | string): Date => {
+    const year = parseInt(`20${ordinal.toString().substring(0, 2)}`);
+    const day = parseInt(ordinal.toString().substring(2));
+    const date = new Date(year, 0);
+    date.setDate(day);
+    return date;
+};
+
+export const dateToOrdinal = (date: Date): number => {
+    const start = new Date(date.getUTCFullYear(), 0, 0);
+    const diff = date.getTime() - start.getTime();
+    const day = `00${(Math.floor(diff / (1000 * 60 * 60 * 24)) + 1)}`;
+    return parseInt(`${(`${date.getUTCFullYear()}`).substring(2)}${day.substring(day.length - 3)}`);
+};