diff --git a/client/src/Hooks/useMaintenanceWindowForm.ts b/client/src/Hooks/useMaintenanceWindowForm.ts
index 1f10d55efd..4e7d84a9a9 100644
--- a/client/src/Hooks/useMaintenanceWindowForm.ts
+++ b/client/src/Hooks/useMaintenanceWindowForm.ts
@@ -2,6 +2,7 @@ import { useMemo } from "react";
 import dayjs from "dayjs";
 import {
 	maintenanceWindowSchema,
+	maintenanceWindowEditSchema,
 	repeatOptions,
 	type MaintenanceWindowFormData,
 } from "@/Validation/maintenanceWindow";
@@ -47,6 +48,9 @@ export const useMaintenanceWindowForm = ({
 			};
 		}
 
-		return { schema: maintenanceWindowSchema, defaults };
+		return {
+			schema: data ? maintenanceWindowEditSchema : maintenanceWindowSchema,
+			defaults,
+		};
 	}, [data]);
 };
diff --git a/client/src/Validation/maintenanceWindow.ts b/client/src/Validation/maintenanceWindow.ts
index 61ccf3c8da..dbe447e871 100644
--- a/client/src/Validation/maintenanceWindow.ts
+++ b/client/src/Validation/maintenanceWindow.ts
@@ -14,30 +14,32 @@ export const durationUnitOptions = [
 	{ id: "days", name: "days", multiplier: 86400000 },
 ] as const;
 
-export const maintenanceWindowSchema = z
-	.object({
-		name: z
-			.string()
-			.min(1, "Name is required")
-			.max(100, "Name must be at most 100 characters"),
-		repeat: z.string(),
-		startDate: z.string().min(1, "Start date is required"),
-		startTime: z.string().min(1, "Start time is required"),
-		duration: z.number().int().min(1, "Duration must be at least 1"),
-		durationUnit: z.string(),
-		monitors: z.array(z.string()).min(1, "At least one monitor is required"),
-	})
-	.refine(
-		(data) => {
-			const startDateTime = dayjs(data.startDate)
-				.set("hour", parseInt(data.startTime.split(":")[0], 10))
-				.set("minute", parseInt(data.startTime.split(":")[1], 10));
-			return startDateTime.isAfter(dayjs());
-		},
-		{
-			message: "Start date and time must be in the future",
-			path: ["startDate"],
-		}
-	);
+const maintenanceWindowBaseSchema = z.object({
+	name: z
+		.string()
+		.min(1, "Name is required")
+		.max(100, "Name must be at most 100 characters"),
+	repeat: z.string(),
+	startDate: z.string().min(1, "Start date is required"),
+	startTime: z.string().min(1, "Start time is required"),
+	duration: z.number().int().min(1, "Duration must be at least 1"),
+	durationUnit: z.string(),
+	monitors: z.array(z.string()).min(1, "At least one monitor is required"),
+});
+
+export const maintenanceWindowSchema = maintenanceWindowBaseSchema.refine(
+	(data) => {
+		const startDateTime = dayjs(data.startDate)
+			.set("hour", parseInt(data.startTime.split(":")[0], 10))
+			.set("minute", parseInt(data.startTime.split(":")[1], 10));
+		return startDateTime.isAfter(dayjs());
+	},
+	{
+		message: "Start date and time must be in the future",
+		path: ["startDate"],
+	}
+);
+
+export const maintenanceWindowEditSchema = maintenanceWindowBaseSchema;
 
 export type MaintenanceWindowFormData = z.infer<typeof maintenanceWindowSchema>;