diff --git a/components/organization/hackathons/new/tabs/ParticipantTab.tsx b/components/organization/hackathons/new/tabs/ParticipantTab.tsx
index 730d227ce..5a149547a 100644
--- a/components/organization/hackathons/new/tabs/ParticipantTab.tsx
+++ b/components/organization/hackathons/new/tabs/ParticipantTab.tsx
@@ -300,7 +300,8 @@ export default function ParticipantTab({
           />
 
           {/* Team Size Settings */}
-          {participantType === 'team' && (
+          {(participantType === 'team' ||
+            participantType === 'team_or_individual') && (
             <div className='rounded-lg border border-zinc-800 bg-zinc-900/30 p-6'>
               <h4 className='mb-1 text-sm font-medium text-white'>Team Size</h4>
               <p className='mb-4 text-sm text-zinc-500'>
diff --git a/components/organization/hackathons/new/tabs/components/timeline/DateTimeInput.tsx b/components/organization/hackathons/new/tabs/components/timeline/DateTimeInput.tsx
index 9f592e5f0..5dbe3b707 100644
--- a/components/organization/hackathons/new/tabs/components/timeline/DateTimeInput.tsx
+++ b/components/organization/hackathons/new/tabs/components/timeline/DateTimeInput.tsx
@@ -25,9 +25,9 @@ interface DateTimeInputProps {
 
 const formatTimeValue = (date?: Date): string => {
   if (!date) return '';
-  const hours = `${date.getHours()}`.padStart(2, '0');
-  const minutes = `${date.getMinutes()}`.padStart(2, '0');
-  const seconds = `${date.getSeconds()}`.padStart(2, '0');
+  const hours = String(date.getHours()).padStart(2, '0');
+  const minutes = String(date.getMinutes()).padStart(2, '0');
+  const seconds = String(date.getSeconds()).padStart(2, '0');
   return `${hours}:${minutes}:${seconds}`;
 };
 
@@ -100,7 +100,7 @@ export default function DateTimeInput({
         <Input
           type='time'
           step='1'
-          className='bg-background-card h-12 w-32 shrink-0 appearance-none rounded-[12px] border border-gray-900 px-4 text-sm text-white [&::-webkit-calendar-picker-indicator]:hidden [&::-webkit-calendar-picker-indicator]:appearance-none'
+          className='bg-background-card selection:bg-primary/30 h-12 w-40 shrink-0 rounded-[12px] border border-gray-900 px-4 text-sm text-white [&::-webkit-calendar-picker-indicator]:hidden'
           value={formatTimeValue(field.value)}
           onChange={event => {
             const timeValue = event.target.value;
diff --git a/components/organization/hackathons/new/tabs/schemas/participantSchema.ts b/components/organization/hackathons/new/tabs/schemas/participantSchema.ts
index a3df10165..5b6c558f6 100644
--- a/components/organization/hackathons/new/tabs/schemas/participantSchema.ts
+++ b/components/organization/hackathons/new/tabs/schemas/participantSchema.ts
@@ -52,6 +52,19 @@ export const participantSchema = z
         });
       }
     }
+
+    // New validation: At least one submission requirement must be selected
+    if (
+      !data.require_github &&
+      !data.require_demo_video &&
+      !data.require_other_links
+    ) {
+      ctx.addIssue({
+        code: z.ZodIssueCode.custom,
+        message: 'At least one submission requirement must be selected',
+        path: ['require_github'],
+      });
+    }
   });
 
 export type ParticipantFormData = z.input<typeof participantSchema>;