diff --git a/packages/backend/src/server/api/endpoints/admin/abuse-report-resolver/create.ts b/packages/backend/src/server/api/endpoints/admin/abuse-report-resolver/create.ts
index cd0b0350a8..559e1a7300 100644
--- a/packages/backend/src/server/api/endpoints/admin/abuse-report-resolver/create.ts
+++ b/packages/backend/src/server/api/endpoints/admin/abuse-report-resolver/create.ts
@@ -112,9 +112,9 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 				ps.expiresAt === '12hours' ? function () { expirationDate!.setTime(expirationDate!.getTime() + ms('12 hours')); } :
 				ps.expiresAt === '1day' ? function () { expirationDate!.setTime(expirationDate!.getTime() + ms('1 day')); } :
 				ps.expiresAt === '1week' ? function () { expirationDate!.setTime(expirationDate!.getTime() + ms('1 week')); } :
-				ps.expiresAt === '1month' ? function () { expirationDate!.setUTCMonth((expirationDate!.getUTCMonth() + 1) % 12); expirationDate!.setUTCFullYear(expirationDate!.getUTCFullYear() + (Math.floor((expirationDate!.getUTCMonth() + 1) / 12))); } : 
-				ps.expiresAt === '3months' ? function () {expirationDate!.setUTCMonth((expirationDate!.getUTCMonth() + 3) % 12); expirationDate!.setUTCFullYear(expirationDate!.getUTCFullYear() + (Math.floor((expirationDate!.getUTCMonth() + 3) / 12))); } :
-				ps.expiresAt === '6months' ? function () { expirationDate!.setUTCMonth((expirationDate!.getUTCMonth() + 6) % 12); expirationDate!.setUTCFullYear(expirationDate!.getUTCFullYear() + (Math.floor((expirationDate!.getUTCMonth() + 6) / 12))); } :
+				ps.expiresAt === '1month' ? function () { expirationDate!.setUTCMonth((expirationDate!.getUTCMonth() + 1 + 1) % 12 - 1); expirationDate!.setUTCFullYear(expirationDate!.getUTCFullYear() + (Math.floor((expirationDate!.getUTCMonth() + 1 + 1) / 12 - 1))); } : 
+				ps.expiresAt === '3months' ? function () {expirationDate!.setUTCMonth((expirationDate!.getUTCMonth() + 3 + 1) % 12 - 1); expirationDate!.setUTCFullYear(expirationDate!.getUTCFullYear() + (Math.floor((expirationDate!.getUTCMonth() + 3 + 1) / 12 - 1))); } :
+				ps.expiresAt === '6months' ? function () { expirationDate!.setUTCMonth((expirationDate!.getUTCMonth() + 6 + 1) % 12 - 1); expirationDate!.setUTCFullYear(expirationDate!.getUTCFullYear() + (Math.floor((expirationDate!.getUTCMonth() + 6 + 1) / 12 - 1))); } :
 				ps.expiresAt === '1year' ? function () { expirationDate!.setTime(expirationDate!.getTime() + ms('1 year')); } : function () { expirationDate = null; })();
 
 			return await this.abuseReportResolverRepository.insert({
diff --git a/packages/backend/src/server/api/endpoints/admin/abuse-report-resolver/update.ts b/packages/backend/src/server/api/endpoints/admin/abuse-report-resolver/update.ts
index f883104fc3..2797f851f8 100644
--- a/packages/backend/src/server/api/endpoints/admin/abuse-report-resolver/update.ts
+++ b/packages/backend/src/server/api/endpoints/admin/abuse-report-resolver/update.ts
@@ -98,9 +98,9 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 					ps.expiresAt === '12hours' ? function () { expirationDate!.setTime(expirationDate!.getTime() + ms('12 hours')); } :
 					ps.expiresAt === '1day' ? function () { expirationDate!.setTime(expirationDate!.getTime() + ms('1 day')); } :
 					ps.expiresAt === '1week' ? function () { expirationDate!.setTime(expirationDate!.getTime() + ms('1 week')); } :
-					ps.expiresAt === '1month' ? function () { expirationDate!.setUTCMonth((expirationDate!.getUTCMonth() + 1) % 12); expirationDate!.setUTCFullYear(expirationDate!.getUTCFullYear() + (Math.floor((expirationDate!.getUTCMonth() + 1) / 12))); } : 
-					ps.expiresAt === '3months' ? function () {expirationDate!.setUTCMonth((expirationDate!.getUTCMonth() + 3) % 12); expirationDate!.setUTCFullYear(expirationDate!.getUTCFullYear() + (Math.floor((expirationDate!.getUTCMonth() + 3) / 12))); } :
-					ps.expiresAt === '6months' ? function () { expirationDate!.setUTCMonth((expirationDate!.getUTCMonth() + 6) % 12); expirationDate!.setUTCFullYear(expirationDate!.getUTCFullYear() + (Math.floor((expirationDate!.getUTCMonth() + 6) / 12))); } :
+					ps.expiresAt === '1month' ? function () { expirationDate!.setUTCMonth((expirationDate!.getUTCMonth() + 1 + 1) % 12 - 1); expirationDate!.setUTCFullYear(expirationDate!.getUTCFullYear() + (Math.floor((expirationDate!.getUTCMonth() + 1 + 1) / 12))); } : 
+					ps.expiresAt === '3months' ? function () {expirationDate!.setUTCMonth((expirationDate!.getUTCMonth() + 3 + 1) % 12 - 1); expirationDate!.setUTCFullYear(expirationDate!.getUTCFullYear() + (Math.floor((expirationDate!.getUTCMonth() + 3 + 1) / 12))); } :
+					ps.expiresAt === '6months' ? function () { expirationDate!.setUTCMonth((expirationDate!.getUTCMonth() + 6 + 1) % 12 - 1); expirationDate!.setUTCFullYear(expirationDate!.getUTCFullYear() + (Math.floor((expirationDate!.getUTCMonth() + 6 + 1) / 12))); } :
 					ps.expiresAt === '1year' ? function () { expirationDate!.setTime(expirationDate!.getTime() + ms('1 year')); } : function () { expirationDate = null; })();
 
 				properties.expiresAt = ps.expiresAt;