diff --git a/package-lock.json b/package-lock.json
index 2e60fc0..5329c83 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -998,7 +998,6 @@
       "integrity": "sha512-GNWcUTRBgIRJD5zj+Tq0fKOJ5XZajIiBroOF0yvj2bSU1WvNdYS/dn9UxwsujGW4JX06dnHyjV2y9rRaybH0iQ==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "undici-types": "~7.16.0"
       }
@@ -1658,7 +1657,6 @@
         }
       ],
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "baseline-browser-mapping": "^2.8.25",
         "caniuse-lite": "^1.0.30001754",
@@ -2359,7 +2357,6 @@
       "integrity": "sha512-/imKNG4EbWNrVjoNC/1H5/9GFy+tqjGBHCaSsN+P2RnPqjsLmv6UD3Ej+Kj8nBWaRAwyk7kK5ZUc+OEatnTR3A==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "bin": {
         "jiti": "bin/jiti.js"
       }
@@ -2681,7 +2678,6 @@
       "integrity": "sha512-5gTmgEY/sqK6gFXLIsQNH19lWb4ebPDLA4SdLP7dsWkIXHWlG66oPuVvXSGFPppYZz8ZDZq0dYYrbHfBCVUb1Q==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "engines": {
         "node": ">=12"
       },
@@ -2749,7 +2745,6 @@
         }
       ],
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "nanoid": "^3.3.11",
         "picocolors": "^1.1.1",
@@ -3439,7 +3434,6 @@
       "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
       "devOptional": true,
       "license": "Apache-2.0",
-      "peer": true,
       "bin": {
         "tsc": "bin/tsc",
         "tsserver": "bin/tsserver"
@@ -3512,7 +3506,6 @@
       "integrity": "sha512-NL8jTlbo0Tn4dUEXEsUg8KeyG/Lkmc4Fnzb8JXN/Ykm9G4HNImjtABMJgkQoVjOBN/j2WAwDTRytdqJbZsah7w==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "esbuild": "^0.25.0",
         "fdir": "^6.5.0",
@@ -3676,7 +3669,6 @@
       "resolved": "https://registry.npmjs.org/vue/-/vue-3.5.24.tgz",
       "integrity": "sha512-uTHDOpVQTMjcGgrqFPSb8iO2m1DUvo+WbGqoXQz8Y1CeBYQ0FXf2z1gLRaBtHjlRz7zZUBHxjVB5VTLzYkvftg==",
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@vue/compiler-dom": "3.5.24",
         "@vue/compiler-sfc": "3.5.24",
@@ -3705,7 +3697,6 @@
       "resolved": "https://registry.npmjs.org/vue-router/-/vue-router-4.6.3.tgz",
       "integrity": "sha512-ARBedLm9YlbvQomnmq91Os7ck6efydTSpRP3nuOKCvgJOHNrhRoJDSKtee8kcL1Vf7nz6U+PMBL+hTvR3bTVQg==",
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@vue/devtools-api": "^6.6.4"
       },
diff --git a/src/App.vue b/src/App.vue
index d4f3c0c..909def4 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -8,13 +8,14 @@ import InputForm from './components/InputForm.vue'
 import ResultSummary from './components/ResultSummary.vue'
 import Timeline from './components/Timeline.vue'
 import { useAppStore } from './stores/app'
-import { createUnemploymentICS, downloadIcsFile } from './utils/ics'
+import { createUnemploymentICS, createStemEvaluationICS, downloadIcsFile } from './utils/ics'
 
 const store = useAppStore()
 const showHelpModal = ref(false)
 type ToastType = 'success' | 'error'
 const copyStatus = ref<'idle' | 'copied' | 'error'>('idle')
 const exportStatus = ref<'idle' | 'success' | 'error'>('idle')
+const stemEvalStatus = ref<'idle' | 'success' | 'error'>('idle')
 const toasts = ref<{ id: number; message: string; type: ToastType }[]>([])
 let tempTimer: number | null = null
 
@@ -123,6 +124,29 @@ async function exportDeadlines() {
     }, 3000)
   }
 }
+
+async function exportStemEvaluations() {
+  if (!store.stemPeriod) return
+  if (tempTimer) {
+    clearTimeout(tempTimer)
+    tempTimer = null
+  }
+  try {
+    const ics = createStemEvaluationICS(store.stemPeriod.startDate)
+    if (!ics) throw new Error('Missing STEM OPT period')
+    downloadIcsFile(ics, 'stem-opt-evaluations.ics')
+    stemEvalStatus.value = 'success'
+    pushToast('STEM evaluation reminders downloaded', 'success')
+  } catch (error) {
+    console.error('Failed to export STEM evaluation ICS', error)
+    stemEvalStatus.value = 'error'
+    pushToast('Failed to export STEM evaluation reminders', 'error')
+  } finally {
+    tempTimer = window.setTimeout(() => {
+      stemEvalStatus.value = 'idle'
+    }, 3000)
+  }
+}
 </script>
 
 <template>
@@ -203,10 +227,14 @@ async function exportDeadlines() {
               <h2 class="text-xl font-semibold text-gray-900">
                 Unemployment Summary
               </h2>
-              <div class="flex items-center space-x-2">
+              <div class="flex items-center space-x-2 flex-wrap gap-2">
                 <BaseButton variant="secondary" size="sm" :disabled="!store.canCalculate || !store.optPeriod"
                   @click="exportDeadlines">
-                  📆 Add to Calendar
+                  📆 Deadlines
+                </BaseButton>
+                <BaseButton v-if="store.hasStemExtension" variant="secondary" size="sm"
+                  :disabled="!store.stemPeriod" @click="exportStemEvaluations">
+                  📋 STEM Evaluations
                 </BaseButton>
               </div>
             </div>
@@ -276,6 +304,9 @@ async function exportDeadlines() {
                 <dd>150-day unemployment limit</dd>
               </div>
             </dl>
+            <p class="text-slate-600 mt-3 pt-3 border-t border-slate-200">
+              <strong>STEM OPT Evaluations:</strong> Students on STEM OPT must submit Form I-983 evaluations at 6, 12, 18, and 24 months. Use the "STEM Evaluations" button to download calendar reminders.
+            </p>
           </article>
         </section>
 
@@ -288,7 +319,8 @@ async function exportDeadlines() {
               <li>Add STEM dates if you hold the extension.</li>
               <li>Log each employment period (employers, start/end dates).</li>
               <li>Review the summary to see days used vs. remaining.</li>
-              <li>Download ICS reminders or copy the summary for your DSO.</li>
+              <li>Download unemployment deadline reminders or copy the summary for your DSO.</li>
+              <li>If on STEM OPT, download evaluation reminders for 6, 12, 18, and 24-month deadlines.</li>
             </ol>
           </article>
         </section>
diff --git a/src/utils/__tests__/ics.spec.ts b/src/utils/__tests__/ics.spec.ts
new file mode 100644
index 0000000..5de53b5
--- /dev/null
+++ b/src/utils/__tests__/ics.spec.ts
@@ -0,0 +1,80 @@
+import { describe, it, expect } from 'vitest'
+import { createStemEvaluationICS } from '../ics'
+
+describe('createStemEvaluationICS', () => {
+  it('generates ICS with 4 evaluation events', () => {
+    const stemStartDate = new Date('2024-07-15')
+    const ics = createStemEvaluationICS(stemStartDate)
+
+    expect(ics).not.toBeNull()
+    expect(ics).toContain('BEGIN:VCALENDAR')
+    expect(ics).toContain('END:VCALENDAR')
+    expect(ics).toContain('PRODID:-//OPT Tracker//EN')
+
+    // Should have 4 events (6, 12, 18, 24 months)
+    const eventCount = (ics!.match(/BEGIN:VEVENT/g) || []).length
+    expect(eventCount).toBe(4)
+  })
+
+  it('includes correct milestone months in event summaries', () => {
+    const stemStartDate = new Date('2024-07-15')
+    const ics = createStemEvaluationICS(stemStartDate)
+
+    expect(ics).toContain('STEM OPT 6-Month Evaluation Due')
+    expect(ics).toContain('STEM OPT 12-Month Evaluation Due')
+    expect(ics).toContain('STEM OPT 18-Month Evaluation Due')
+    expect(ics).toContain('STEM OPT 24-Month Evaluation Due')
+  })
+
+  it('includes Form I-983 in descriptions', () => {
+    const stemStartDate = new Date('2024-07-15')
+    const ics = createStemEvaluationICS(stemStartDate)
+
+    expect(ics).toContain('Form I-983')
+    expect(ics).toContain('DSO')
+  })
+
+  it('includes reminders for each event', () => {
+    const stemStartDate = new Date('2024-07-15')
+    const ics = createStemEvaluationICS(stemStartDate)
+
+    // Each event should have 3 reminders (30, 7, 1 days)
+    const alarmCount = (ics!.match(/BEGIN:VALARM/g) || []).length
+    expect(alarmCount).toBe(12) // 4 events × 3 reminders
+
+    // Check for specific reminder periods
+    expect(ics).toContain('TRIGGER:-P30D') // 30 days before
+    expect(ics).toContain('TRIGGER:-P7D')  // 7 days before
+    expect(ics).toContain('TRIGGER:-P1D')  // 1 day before
+  })
+
+  it('calculates correct dates for milestones', () => {
+    const stemStartDate = new Date('2024-01-15')
+    const ics = createStemEvaluationICS(stemStartDate)
+
+    // 6 months from Jan 15, 2024 = Jul 15, 2024
+    expect(ics).toContain('20240715')
+    // 12 months from Jan 15, 2024 = Jan 15, 2025
+    expect(ics).toContain('20250115')
+    // 18 months from Jan 15, 2024 = Jul 15, 2025
+    expect(ics).toContain('20250715')
+    // 24 months from Jan 15, 2024 = Jan 15, 2026
+    expect(ics).toContain('20260115')
+  })
+
+  it('returns null if no start date provided', () => {
+    const ics = createStemEvaluationICS(null as any)
+    expect(ics).toBeNull()
+  })
+
+  it('handles leap year dates correctly', () => {
+    const stemStartDate = new Date('2024-02-29') // Leap year
+    const ics = createStemEvaluationICS(stemStartDate)
+
+    expect(ics).not.toBeNull()
+    // 6 months from Feb 29, 2024 should be Aug 29, 2024
+    expect(ics).toContain('20240829')
+    // 12 months from Feb 29, 2024 should be Feb 28, 2025 (not a leap year)
+    expect(ics).toContain('20250228')
+  })
+})
diff --git a/src/utils/ics.ts b/src/utils/ics.ts
index faf0a67..8f58903 100644
--- a/src/utils/ics.ts
+++ b/src/utils/ics.ts
@@ -1,4 +1,4 @@
-import { addDays, format } from 'date-fns'
+import { addDays, addMonths, format } from 'date-fns'
 import type { EADPeriod } from '../types'
 import {
   OPT_UNEMPLOYMENT_LIMIT,
@@ -21,8 +21,13 @@ function generateUid(): string {
   return `opt-${Date.now()}-${Math.random().toString(36).slice(2)}`
 }
 
-function buildEvent(summary: string, date: Date, description: string): string[] {
-  return [
+function buildEvent(
+  summary: string,
+  date: Date,
+  description: string,
+  reminders?: number[]
+): string[] {
+  const event = [
     'BEGIN:VEVENT',
     `UID:${generateUid()}`,
     `DTSTAMP:${formatICSDate(new Date())}`,
@@ -30,8 +35,21 @@ function buildEvent(summary: string, date: Date, description: string): string[]
     `DTEND:${formatICSDate(addDays(date, 1))}`,
     `SUMMARY:${summary}`,
     `DESCRIPTION:${description}`,
-    'END:VEVENT',
   ]
+
+  // Add reminders/alarms if provided
+  if (reminders && reminders.length > 0) {
+    for (const reminderDays of reminders) {
+      event.push('BEGIN:VALARM')
+      event.push('ACTION:DISPLAY')
+      event.push(`DESCRIPTION:${summary}`)
+      event.push(`TRIGGER:-P${reminderDays}D`)
+      event.push('END:VALARM')
+    }
+  }
+
+  event.push('END:VEVENT')
+  return event
 }
 
 export function createUnemploymentICS(
@@ -81,6 +99,34 @@ export function createUnemploymentICS(
   ].join('\r\n')
 }
 
+/**
+ * Creates ICS calendar file with STEM OPT evaluation reminders
+ * Generates events for 6, 12, 18, and 24-month evaluations with reminders
+ */
+export function createStemEvaluationICS(stemStartDate: Date): string | null {
+  if (!stemStartDate) return null
+
+  const events: string[] = []
+  const milestones = [6, 12, 18, 24]
+  const reminders = [30, 7, 1] // 30 days, 7 days, 1 day before
+
+  for (const months of milestones) {
+    const evaluationDate = addMonths(stemStartDate, months)
+    const summary = `STEM OPT ${months}-Month Evaluation Due`
+    const description = `This is your STEM OPT ${months}-month evaluation deadline. Please submit Form I-983 evaluation to your DSO before the deadline.`
+    
+    events.push(...buildEvent(summary, evaluationDate, description, reminders))
+  }
+
+  return [
+    'BEGIN:VCALENDAR',
+    'VERSION:2.0',
+    'PRODID:-//OPT Tracker//EN',
+    ...events,
+    'END:VCALENDAR',
+  ].join('\r\n')
+}
+
 export function downloadIcsFile(content: string, filename: string): void {
   const blob = new Blob([content], { type: 'text/calendar' })
   const url = URL.createObjectURL(blob)