diff --git a/server/private/routers/auditLogs/queryAccessAuditLog.ts b/server/private/routers/auditLogs/queryAccessAuditLog.ts
index 96ae7711b..47182f934 100644
--- a/server/private/routers/auditLogs/queryAccessAuditLog.ts
+++ b/server/private/routers/auditLogs/queryAccessAuditLog.ts
@@ -54,7 +54,6 @@ export const queryAccessAuditLogsQuery = z.object({
             error: "timeEnd must be a valid ISO date string"
         })
         .transform((val) => Math.floor(new Date(val).getTime() / 1000))
-        .optional()
         .prefault(() => new Date().toISOString())
         .openapi({
             type: "string",
diff --git a/server/private/routers/auditLogs/queryActionAuditLog.ts b/server/private/routers/auditLogs/queryActionAuditLog.ts
index 271929875..6416f2052 100644
--- a/server/private/routers/auditLogs/queryActionAuditLog.ts
+++ b/server/private/routers/auditLogs/queryActionAuditLog.ts
@@ -47,7 +47,6 @@ export const queryActionAuditLogsQuery = z.object({
             error: "timeEnd must be a valid ISO date string"
         })
         .transform((val) => Math.floor(new Date(val).getTime() / 1000))
-        .optional()
         .prefault(() => new Date().toISOString())
         .openapi({
             type: "string",
diff --git a/server/private/routers/auditLogs/queryConnectionAuditLog.ts b/server/private/routers/auditLogs/queryConnectionAuditLog.ts
index e214d0c66..c686a74d0 100644
--- a/server/private/routers/auditLogs/queryConnectionAuditLog.ts
+++ b/server/private/routers/auditLogs/queryConnectionAuditLog.ts
@@ -55,7 +55,6 @@ export const queryConnectionAuditLogsQuery = z.object({
             error: "timeEnd must be a valid ISO date string"
         })
         .transform((val) => Math.floor(new Date(val).getTime() / 1000))
-        .optional()
         .prefault(() => new Date().toISOString())
         .openapi({
             type: "string",
diff --git a/server/routers/auditLogs/queryAiSessionLog.ts b/server/routers/auditLogs/queryAiSessionLog.ts
index 5cd3cf8c1..7ac8524df 100644
--- a/server/routers/auditLogs/queryAiSessionLog.ts
+++ b/server/routers/auditLogs/queryAiSessionLog.ts
@@ -47,7 +47,6 @@ export const queryAiSessionLogsQuery = z.strictObject({
             error: "timeEnd must be a valid ISO date string"
         })
         .transform((val) => Math.floor(new Date(val).getTime() / 1000))
-        .optional()
         .prefault(() => new Date().toISOString())
         .openapi({
             type: "string",
diff --git a/server/routers/auditLogs/queryRequestAnalytics.ts b/server/routers/auditLogs/queryRequestAnalytics.ts
index 7f8aaf047..d4c1eac53 100644
--- a/server/routers/auditLogs/queryRequestAnalytics.ts
+++ b/server/routers/auditLogs/queryRequestAnalytics.ts
@@ -20,7 +20,6 @@ const queryAccessAuditLogsQuery = z.object({
             error: "timeStart must be a valid ISO date string"
         })
         .transform((val) => Math.floor(new Date(val).getTime() / 1000))
-        .optional()
         .prefault(() => getSevenDaysAgo().toISOString())
         .openapi({
             type: "string",
@@ -34,7 +33,6 @@ const queryAccessAuditLogsQuery = z.object({
             error: "timeEnd must be a valid ISO date string"
         })
         .transform((val) => Math.floor(new Date(val).getTime() / 1000))
-        .optional()
         .prefault(() => new Date().toISOString())
         .openapi({
             type: "string",
diff --git a/server/routers/auditLogs/queryRequestAuditLog.ts b/server/routers/auditLogs/queryRequestAuditLog.ts
index 6c246a01c..16767edc7 100644
--- a/server/routers/auditLogs/queryRequestAuditLog.ts
+++ b/server/routers/auditLogs/queryRequestAuditLog.ts
@@ -41,7 +41,6 @@ export const queryAccessAuditLogsQuery = z.strictObject({
             error: "timeEnd must be a valid ISO date string"
         })
         .transform((val) => Math.floor(new Date(val).getTime() / 1000))
-        .optional()
         .prefault(() => new Date().toISOString())
         .openapi({
             type: "string",