diff --git a/server/routes/pushTime.js b/server/routes/pushTime.js
index 070c74f..5266e2e 100644
--- a/server/routes/pushTime.js
+++ b/server/routes/pushTime.js
@@ -3,7 +3,7 @@ import { config } from '../config.js'
 import { getDocument } from '../services/appwriteAdmin.js'
 import { escapeHtml } from '../services/mailTemplates.js'
 import { verifyPushTimeToken } from '../services/pushTimeToken.js'
-import { applyPushTime, formatMinutes, needsTimeEntry, parseMinutes, MAX_MINUTES } from '../services/pushTimeEntry.js'
+import { applyPushTime, formatMinutes, needsTimeEntry, parseMinutes, MAX_MINUTES, TIME_STEP } from '../services/pushTimeEntry.js'
 
 /**
  * Bestaetigungsseite der Push-Zeitmail: /zeit/<token>[?min=60].
@@ -84,13 +84,13 @@ dt{color:#6b6964;margin-top:8px}
 dd{margin:0}
 ul{margin:4px 0 0;padding-left:18px;font-family:Menlo,Consolas,monospace;font-size:13px}
 label{display:block;font-weight:bold;margin:22px 0 6px}
-input[type=number]{width:100%;font-size:20px;padding:12px;border:1px solid #d9d6ce;border-radius:10px}
+select{width:100%;font-size:20px;padding:12px;border:1px solid #d9d6ce;border-radius:10px;background:#fff;color:inherit}
 .err{background:#fdecec;color:#8a1c1c;border-radius:10px;padding:10px 12px;margin-top:16px;font-size:14px}
 .ok{background:#e6f4ea;color:#1d5b2c;border-radius:10px;padding:10px 12px;margin-top:4px}
 button,.btn{display:inline-block;margin-top:16px;padding:13px 22px;border-radius:10px;font-size:16px;font-weight:bold;text-decoration:none;cursor:pointer}
 button{background:#111;color:#fff;border:0;width:100%}
 .btn{background:#fff;color:#111;border:1px solid #d9d6ce}
-@media (prefers-color-scheme:dark){body{background:#161615;color:#f2f1ee}.card{background:#1f1f1e}input[type=number]{background:#2a2a28;color:#f2f1ee;border-color:#3a3a37}button{background:#f2f1ee;color:#161615}.btn{background:#2a2a28;color:#f2f1ee;border-color:#3a3a37}.mut,dt{color:#a8a6a0}}
+@media (prefers-color-scheme:dark){body{background:#161615;color:#f2f1ee}.card{background:#1f1f1e}select{background:#2a2a28;color:#f2f1ee;border-color:#3a3a37}button{background:#f2f1ee;color:#161615}.btn{background:#2a2a28;color:#f2f1ee;border-color:#3a3a37}.mut,dt{color:#a8a6a0}}
 </style>
 </head>
 <body><main>
@@ -133,6 +133,16 @@ async function loadTicket(ws) {
   }
 }
 
+// 15 Min bis 12 Std in 15er-Schritten; ohne gueltige Vorgabe ist 1 Std gewaehlt
+function minuteOptions(selected) {
+  const chosen = parseMinutes(selected) ?? 60
+  const options = []
+  for (let m = TIME_STEP; m <= MAX_MINUTES; m += TIME_STEP) {
+    options.push(`<option value="${m}"${m === chosen ? ' selected' : ''}>${e(formatMinutes(m))}</option>`)
+  }
+  return options.join('')
+}
+
 function formPage(res, status, { ws, ticket, token, minutes, error }) {
   const { repo, commits } = pushInfo(ws.details)
   const woid = ticket?.woid || ws.woid
@@ -152,7 +162,7 @@ ${commits.length ? `<dt>Commits</dt><dd><ul>${commits.map((c) => `<li>${e(c)}</l
 ${error ? `<div class="err">${e(error)}</div>` : ''}
 <form method="post" action="/zeit/${e(token)}">
 <label for="minutes">Minuten</label>
-<input id="minutes" type="number" name="minutes" min="1" max="${MAX_MINUTES}" step="1" inputmode="numeric" value="${e(minutes ?? '')}" required autofocus>
+<select id="minutes" name="minutes" required autofocus>${minuteOptions(minutes)}</select>
 <button type="submit">Speichern</button>
 </form>
 ${openTicket(woid)}`
@@ -222,7 +232,7 @@ router.post('/:token', async (req, res) => {
         ...found,
         token: req.params.token,
         minutes: '',
-        error: `Bitte ganze Minuten zwischen 1 und ${MAX_MINUTES} eingeben.`,
+        error: 'Bitte eine Zeit in 15-Minuten-Schritten wählen.',
       })
     }
 
diff --git a/server/services/pushTimeEntry.js b/server/services/pushTimeEntry.js
index 05f9a0b..20f4c8b 100644
--- a/server/services/pushTimeEntry.js
+++ b/server/services/pushTimeEntry.js
@@ -37,13 +37,16 @@ export function needsTimeEntry(ws) {
   return ws?.serviceType === 'GIT' && !(ws.startTime && Number(ws.totalTime) > 0)
 }
 
-/** Ganze Minuten 1-720 aus Formular/Query, sonst null */
+/** Zeiten nur in 15-Minuten-Schritten (wie WOMS lib/timeSteps.js) */
+export const TIME_STEP = 15
+
+/** 15-720 in 15er-Schritten aus Formular/Query, sonst null */
 export function parseMinutes(raw) {
   if (raw === null || raw === undefined) return null
   const text = String(raw).trim()
   if (!/^\d+$/.test(text)) return null
   const value = Number(text)
-  return value >= 1 && value <= MAX_MINUTES ? value : null
+  return value >= TIME_STEP && value <= MAX_MINUTES && value % TIME_STEP === 0 ? value : null
 }
 
 /** 15 -> '15 Min', 60 -> '1 Std', 90 -> '1,5 Std', 130 -> '2 Std 10 Min' */
diff --git a/test/pushTimeEntry.test.js b/test/pushTimeEntry.test.js
index 9a4fd94..d13b061 100644
--- a/test/pushTimeEntry.test.js
+++ b/test/pushTimeEntry.test.js
@@ -44,10 +44,11 @@ test('needsTimeEntry', () => {
   assert.equal(needsTimeEntry({ serviceType: 'Remote', startTime: '', totalTime: 0 }), false)
 })
 
-test('parseMinutes: ganze Minuten 1–720', () => {
+test('parseMinutes: nur 15-Minuten-Schritte 15–720', () => {
   assert.equal(parseMinutes('45'), 45)
+  assert.equal(parseMinutes('15'), 15)
   assert.equal(parseMinutes(720), 720)
-  for (const bad of ['1.5', '0', '721', '', 'abc', undefined, null, '-5', '45abc']) {
+  for (const bad of ['1.5', '0', '721', '735', '70', '1', '', 'abc', undefined, null, '-5', '-15', '45abc']) {
     assert.equal(parseMinutes(bad), null, String(bad))
   }
 })
diff --git a/test/pushTimeRoute.test.js b/test/pushTimeRoute.test.js
index 035c8ea..6be32d8 100644
--- a/test/pushTimeRoute.test.js
+++ b/test/pushTimeRoute.test.js
@@ -90,10 +90,15 @@ test('GET speichert nie', async () => {
   assert.equal(ws.startTime, '')
 })
 
-test('GET mit min=60 füllt das Feld vor, Unsinn nicht', async () => {
+test('GET: Auswahl in 15-Minuten-Schritten, min=90 vorausgewählt, sonst 1 Std', async () => {
   const t = token('open1')
-  assert.match((await get(`/zeit/${t}?min=60`)).html, /name="minutes"[^>]*value="60"/)
-  assert.match((await get(`/zeit/${t}?min=abc`)).html, /name="minutes"[^>]*value=""/)
+  const html = (await get(`/zeit/${t}?min=90`)).html
+  assert.match(html, /<select id="minutes" name="minutes"/)
+  assert.equal((html.match(/<option /g) || []).length, 48)
+  assert.match(html, /<option value="90" selected>1,5 Std<\/option>/)
+  assert.doesNotMatch(html, /type="number"/)
+  assert.match((await get(`/zeit/${t}?min=abc`)).html, /<option value="60" selected>1 Std<\/option>/)
+  assert.match((await get(`/zeit/${t}?min=70`)).html, /<option value="60" selected>1 Std<\/option>/)
 })
 
 test('POST speichert', async () => {
@@ -107,10 +112,10 @@ test('POST speichert', async () => {
 })
 
 test('POST mit ungültigen Minuten', async () => {
-  for (const minutes of ['0', '721', '1.5', '']) {
+  for (const minutes of ['0', '721', '1.5', '', '70', '735']) {
     const r = await post(`/zeit/${token('open3')}`, { minutes })
     assert.equal(r.status, 400, minutes)
-    assert.match(r.html, /Bitte ganze Minuten zwischen 1 und 720 eingeben\./)
+    assert.match(r.html, /Bitte eine Zeit in 15-Minuten-Schritten wählen\./)
     assert.match(r.html, /name="minutes"/)
   }
   assert.equal(fake.get('worksheets', 'open3').totalTime, 0)