diff --git a/packages/backend/src/server/api/mastodon/endpoints/meta.ts b/packages/backend/src/server/api/mastodon/endpoints/meta.ts
index e5726fbaee..809a9aa117 100644
--- a/packages/backend/src/server/api/mastodon/endpoints/meta.ts
+++ b/packages/backend/src/server/api/mastodon/endpoints/meta.ts
@@ -88,8 +88,8 @@ export async function getInstance(response: Entity.Instance) {
 			bot: true,
 			discoverable: false,
 			group: false,
-			created_at: Math.floor(new Date().getTime() / 1000),
-			createdAt: Math.floor(new Date().getTime() / 1000),
+			created_at: new Date().toISOString(),
+			createdAt: new Date().toISOString(),
 			note: "Please refer to the original instance for the actual admin contact.",
 			url: "/",
 			avatar: "/static-assets/badges/info.png",
@@ -99,7 +99,7 @@ export async function getInstance(response: Entity.Instance) {
 			followers_count: -1,
 			following_count: 0,
 			statuses_count: 0,
-			last_status_at: Math.floor(new Date().getTime() / 1000),
+			last_status_at: new Date().toISOString(),
 			noindex: true,
 			emojis: [],
 			fields: [],