diff --git a/ui/src/routes/WorkingHours.svelte b/ui/src/routes/WorkingHours.svelte
index 137cb2f..442da7f 100644
--- a/ui/src/routes/WorkingHours.svelte
+++ b/ui/src/routes/WorkingHours.svelte
@@ -127,7 +127,7 @@
                 <!--suppress HtmlUnknownTarget -->
                 <form action="/working-hours">
                     <fieldset>
-                        <button on:click={() => {activeRecord = {}; newRecord = true}}>Neuer Eintrag
+                        <button on:click={() => {activeRecord = {workingTime: '00:00:00'}; newRecord = true}}>Neuer Eintrag
                             <IconifyIcon icon={documentIcon}/>
                         </button>
                     </fieldset>
@@ -168,13 +168,13 @@
                 <fieldset name="record-data">
                     <div>
                         <label for="workingDay">Arbeitstag</label>
-                        <input bind:value={activeRecord.workingDay} placeholder="Arbeitstag" type="date"
-                               id="workingDay">
+                        <input bind:value={activeRecord.workingDay} type="date"
+                               id="workingDay" required pattern="\d{4}-\d{2}-\d{2}">
                     </div>
                     <div>
                         <label for="workingTime">Arbeitszeit</label>
                         <input bind:value={activeRecord.workingTime} placeholder="Arbeitszeit" type="time"
-                               id="workingTime">
+                               id="workingTime" required pattern="[0-5]\d:[0-5]\d:[0-5]\d">
                     </div>
                 </fieldset>
                 <fieldset name="buttons">