diff --git a/src/content.config.ts b/src/content.config.ts
index ac16dee..04a51d1 100644
--- a/src/content.config.ts
+++ b/src/content.config.ts
@@ -34,7 +34,10 @@ const post = defineCollection({
 			draft: z.boolean().default(false),
 			banner: z.string().optional(),
 			tags: z.array(z.string()).default([]).transform(removeDupsAndLowerCase),
-			date: z.union([z.string(), z.number(), z.date()]).transform(processDate),
+			date: z
+				.union([z.string(), z.number(), z.date()])
+				.optional()
+				.transform((val) => (val ? processDate(val) : undefined)),
 			date_modified: z
 				.union([z.string(), z.number(), z.date()])
 				.optional()
@@ -52,7 +55,10 @@ const note = defineCollection({
 	loader: glob({ base: "./src/content/note", pattern: "**/*.{md,mdx}" }),
 	schema: baseSchema.extend({
 		description: z.string().optional().nullable(),
-		date: z.union([z.string(), z.number(), z.date()]).transform(processDate),
+		date: z
+			.union([z.string(), z.number(), z.date()])
+			.optional()
+			.transform((val) => (val ? processDate(val) : undefined)),
 		date_modified: z
 			.union([z.string(), z.number(), z.date()])
 			.optional()
diff --git a/src/utils/date.ts b/src/utils/date.ts
index b7daec6..0961abf 100644
--- a/src/utils/date.ts
+++ b/src/utils/date.ts
@@ -19,25 +19,12 @@ export function collectionDateSort(
 	a: CollectionEntry<"post" | "note">,
 	b: CollectionEntry<"post" | "note">,
 ) {
-	return b.data.date.getTime() - a.data.date.getTime();
-}
-
-const datePriorityForNote = ["date", "date_modified", "data_created"];
-
-export function collectionModifiedDateSort(
-	a: CollectionEntry<"post" | "note">,
-	b: CollectionEntry<"post" | "note">,
-) {
-	let dateA: Date = new Date(),
-		dateB: Date = new Date();
-	datePriorityForNote.forEach((key) => {
-		if (a.data[key as keyof typeof a.data]) {
-			dateA = a.data[key as keyof typeof a.data] as Date;
-		}
-		if (b.data[key as keyof typeof b.data]) {
-			dateB = b.data[key as keyof typeof b.data] as Date;
-		}
-	});
-
-	return dateB.getTime() - dateA.getTime();
+	const getDate = (entry: CollectionEntry<"post" | "note">): Date => {
+		if (entry.data.date) return entry.data.date;
+		if (entry.data.data_created) return entry.data.data_created;
+		if (entry.data.date_modified) return entry.data.date_modified;
+		return new Date();
+	};
+
+	return getDate(b).getTime() - getDate(a).getTime();
 }