diff --git a/src/i18n/en-ca/index.ts b/src/i18n/en-ca/index.ts
index 1f96213..842d03a 100644
--- a/src/i18n/en-ca/index.ts
+++ b/src/i18n/en-ca/index.ts
@@ -191,6 +191,8 @@ export default {
             INVALID_SHIFT_TIME: "In and Out shift times are reversed",
             SHIFT_OVERLAP: "An overlaps occured between 2 or more shifts",
             INVALID_SHIFT: "A shift contains missing or corrupted data",
+            SHIFT_TIME_REQUIRED: "Valid time required",
+            SHIFT_TYPE_REQUIRED: "Shift type required",
             SHIFT_NOT_FOUND: "Shift missing or deleted",
             PAY_PERIOD_NOT_FOUND: "No pay period matching given dates",
             EMPLOYEE_NOT_FOUND: "No employee matching current login details",
diff --git a/src/i18n/fr-ca/index.ts b/src/i18n/fr-ca/index.ts
index 43b22b5..3283e4e 100644
--- a/src/i18n/fr-ca/index.ts
+++ b/src/i18n/fr-ca/index.ts
@@ -192,6 +192,8 @@ export default {
             INVALID_SHIFT_TIME: "Les heures d'entrée et de sortie sont inversées",
             SHIFT_OVERLAP: "Il y a un chevauchement entre deux ou plusieurs quarts",
             INVALID_SHIFT: "Un quart de travail contient des données manquantes ou corrompues",
+            SHIFT_TIME_REQUIRED: "Heure requise",
+            SHIFT_TYPE_REQUIRED: "Type requis",
             SHIFT_NOT_FOUND: "Quart de travail manquant ou supprimé",
             PAY_PERIOD_NOT_FOUND: "Aucune période de paie ne correspond aux dates fournies",
             EMPLOYEE_NOT_FOUND: "Aucun employé ne correspond aux détails de votre connexion",
diff --git a/src/modules/timesheets/components/shift-list-day-row.vue b/src/modules/timesheets/components/shift-list-day-row.vue
index 0b92714..6d8fd1f 100644
--- a/src/modules/timesheets/components/shift-list-day-row.vue
+++ b/src/modules/timesheets/components/shift-list-day-row.vue
@@ -3,21 +3,17 @@
     lang="ts"
 >
     /* eslint-disable*/
-    import { onBeforeUnmount, onMounted, ref, useTemplateRef } from 'vue';
+    import { onBeforeUnmount, onMounted, ref, useTemplateRef, watch, nextTick } from 'vue';
     import { useI18n } from 'vue-i18n';
-    import { QSelect } from 'quasar';
-    import { Shift, ShiftType } from 'src/modules/timesheets/models/shift.models';
+    import { QSelect, QInput } from 'quasar';
+    import { Shift, type ShiftOption } from 'src/modules/timesheets/models/shift.models';
     import { useUiStore } from 'src/stores/ui-store';
+    import { useShiftRules } from 'src/modules/timesheets/utils/shift.util';
 
+    let timer: NodeJS.Timeout;
     const { t } = useI18n();
     const ui_store = useUiStore();
-
-    interface ShiftOption {
-        label: string;
-        value: ShiftType;
-        icon: string;
-        icon_color: string;
-    }
+    const shift_rules = useShiftRules(t('timesheet.errors.SHIFT_TIME_REQUIRED'),);
 
     const COMMENT_LENGTH_MAX = 280;
     const SHIFT_OPTIONS: ShiftOption[] = [
@@ -28,8 +24,12 @@
         { label: t('timesheet.shift.types.HOLIDAY'), value: 'HOLIDAY', icon: 'forest', icon_color: 'green-8' },
         { label: t('timesheet.shift.types.SICK'), value: 'SICK', icon: 'medication_liquid', icon_color: 'light-blue-6' },
     ];
-
     const shift = defineModel<Shift>('shift', { required: true });
+    const shift_type_selected = ref(SHIFT_OPTIONS.find(option => option.value == shift.value.type));
+    const select_ref = useTemplateRef<QSelect>('select');
+    const start_time_ref = useTemplateRef<QInput>('start_time');
+    const end_time_ref = useTemplateRef<QInput>('end_time');
+
     const { dense = false, hasShiftAfter = false, isTimesheetApproved = false } = defineProps<{
         dense?: boolean;
         hasShiftAfter?: boolean;
@@ -41,12 +41,6 @@
         'requestDelete': [void];
     }>();
 
-    const select_ref = useTemplateRef<QSelect>('select');
-
-    let timer: NodeJS.Timeout;
-
-    const shift_type_selected = ref(SHIFT_OPTIONS.find(option => option.value == shift.value.type));
-
     const onBlurShiftTypeSelect = () => {
         if (shift_type_selected.value === undefined) {
             shift.value.type = 'REGULAR';
@@ -80,6 +74,10 @@
     onBeforeUnmount(() => {
         clearTimeout(timer);
     });
+
+    watch(() => [start_time_ref.value?.hasError, end_time_ref.value?.hasError], ([start_error, end_error]) => {
+        shift.value.has_error = (start_error || end_error) ?? false;
+    })
 </script>
 
 <template>
@@ -98,8 +96,8 @@
 
         <div :class="ui_store.is_mobile_mode ? 'column' : 'row'">
             <div
-                class="row items-center text-uppercase rounded-5"
-                :class="ui_store.is_mobile_mode ? 'col q-mb-xs' : 'col-4'"
+                class="row items-start text-uppercase rounded-5"
+                :class="ui_store.is_mobile_mode ? 'col q-mb-xs q-px-xs' : 'col-4'"
             >
                 <!-- mobile comment button -->
                 <q-btn
@@ -168,10 +166,10 @@
                     menu-anchor="bottom middle"
                     menu-self="top middle"
                     :options="SHIFT_OPTIONS"
-                    class="col rounded-5 q-mx-xs bg-dark"
+                    class="col rounded-5 q-mx-xs bg-dark q-pt-xs"
                     :class="!shift.is_approved && !isTimesheetApproved ? '' : 'inset-shadow'"
-                    :style="shift.is_approved ? 'background-color: #0a7d32 !important;' : ''"
                     popup-content-class="text-uppercase text-weight-bold text-center rounded-5"
+                    :style="shift.is_approved ? 'background-color: #0a7d32 !important;' : ''"
                     popup-content-style="border: 2px solid var(--q-accent)"
                     @blur="onBlurShiftTypeSelect"
                     @update:model-value="option => shift.type = option.value"
@@ -198,9 +196,10 @@
                 </q-select>
             </div>
 
-            <div class="col row flex-center text-uppercase rounded-5 q-pa-xs">
+            <div class="col row items-start text-uppercase rounded-5 q-pa-xs">
                 <!-- punch in field -->
                 <q-input
+                    ref="start_time"
                     v-model="shift.start_time"
                     dense
                     :borderless="(shift.is_approved && isTimesheetApproved)"
@@ -208,11 +207,15 @@
                     type="time"
                     :standout="$q.dark.isActive ? 'bg-blue-grey-3' : 'bg-blue-grey-9'"
                     label-slot
+                    lazy-rules
+                    no-error-icon
+                    hide-bottom-space
+                    :rules="[shift_rules.isTimeRequired]"
                     :label-color="!shift.is_approved ? 'accent' : 'white'"
-                    :input-class="'text-weight-medium ' + (shift.id === -2 ? 'text-white ' : ' ') + (shift.is_approved ? 'text-white cursor-not-allowed q-px-sm' : '')"
-                    input-style="font-size: 1.2em;"
                     class="col rounded-5 bg-dark"
                     :class="(shift.id === -2 ? 'bg-negative ' : ' ') + (ui_store.is_mobile_mode ? 'q-mr-xs ' : 'q-mx-xs ') + (!shift.is_approved && !isTimesheetApproved ? '' : 'cursor-not-allowed inset-shadow')"
+                    :input-class="'text-weight-medium ' + (shift.id === -2 ? 'text-white ' : ' ') + (shift.is_approved ? 'text-white cursor-not-allowed q-px-sm' : '')"
+                    input-style="font-size: 1.2em;"
                     :style="shift.is_approved ? 'background-color: #0a7d32 !important;' : ''"
                 >
                     <template #label>
@@ -226,6 +229,7 @@
 
                 <!-- punch out field -->
                 <q-input
+                    ref="end_time"
                     v-model="shift.end_time"
                     :standout="$q.dark.isActive ? 'bg-blue-grey-3' : 'bg-blue-grey-9'"
                     dense
@@ -233,6 +237,10 @@
                     :readonly="(shift.is_approved && isTimesheetApproved)"
                     type="time"
                     label-slot
+                    lazy-rules
+                    no-error-icon
+                    hide-bottom-space
+                    :rules="[shift_rules.isTimeRequired]"
                     :label-color="!shift.is_approved ? 'accent' : 'white'"
                     :input-class="'text-weight-medium ' + (shift.id === -2 ? 'text-white ' : ' ') + (shift.is_approved ? 'text-white cursor-not-allowed q-px-sm' : '')"
                     input-style="font-size: 1.2em;"
@@ -250,7 +258,7 @@
                 </q-input>
 
                 <!-- comment and delete buttons -->
-                <div :class="ui_store.is_mobile_mode ? 'col-12 row' : 'col-auto'">
+                <div :class="ui_store.is_mobile_mode ? 'col-12 row' : 'col-auto self-start'">
                     <q-icon
                         v-if="shift.type && dense"
                         :name="shift.comment ? 'comment' : ''"
@@ -328,7 +336,7 @@
                         :class="shift.is_approved ? 'invisible' : ''"
                         @click="$emit('requestDelete')"
                     >
-                        <q-badge 
+                        <q-badge
                             v-if="!shift.is_approved"
                             color="white"
                             class="absolute"
@@ -346,4 +354,18 @@
         color="accent"
         class="q-mx-md"
     />
-</template>
\ No newline at end of file
+</template>
+
+<style scoped>
+:deep(.q-field--error) {
+    background-color: var(--q-negative) !important;
+}
+
+:deep(.q-field--error .q-field__bottom) {
+    color: white;
+    font-weight: 900;
+    border-radius: 0 0 5px 5px;
+    padding-top: 0;
+    align-items: center;
+}
+</style>
\ No newline at end of file
diff --git a/src/modules/timesheets/components/timesheet-wrapper.vue b/src/modules/timesheets/components/timesheet-wrapper.vue
index 7686148..a392b6e 100644
--- a/src/modules/timesheets/components/timesheet-wrapper.vue
+++ b/src/modules/timesheets/components/timesheet-wrapper.vue
@@ -2,30 +2,34 @@
     setup
     lang="ts"
 >
+    /* eslint-disable */
     import ShiftList from 'src/modules/timesheets/components/shift-list.vue';
     import ExpenseDialog from 'src/modules/timesheets/components/expense-dialog.vue';
     import PayPeriodNavigator from 'src/modules/shared/components/pay-period-navigator.vue';
     import TimesheetErrorWidget from 'src/modules/timesheets/components/timesheet-error-widget.vue';
     import LoadingOverlay from 'src/modules/shared/components/loading-overlay.vue';
-    import { useTimesheetStore } from 'src/stores/timesheet-store';
+
+    import { computed } from 'vue';
+    import { useShiftApi } from 'src/modules/timesheets/composables/use-shift-api';
     import { useTimesheetApi } from 'src/modules/timesheets/composables/use-timesheet-api';
     import { useExpensesStore } from 'src/stores/expense-store';
-    import { useShiftApi } from 'src/modules/timesheets/composables/use-shift-api';
+    import { useTimesheetStore } from 'src/stores/timesheet-store';
+
 
     const expenses_store = useExpensesStore();
     const timesheet_store = useTimesheetStore();
     const timesheet_api = useTimesheetApi();
     const shift_api = useShiftApi();
+    const has_shift_errors = computed(() => timesheet_store.all_current_shifts.filter(shift => shift.has_error === true).length > 0);
 
     const { mode = 'normal' } = defineProps<{
         mode?: 'approval' | 'normal';
     }>();
+
 </script>
 
 <template>
-    <div
-        class="column flex-center full-width"
-    >
+    <div class="column flex-center full-width">
         <LoadingOverlay v-model="timesheet_store.is_loading" />
 
         <q-card
@@ -64,8 +68,8 @@
                     v-if="mode === 'normal'"
                     push
                     rounded
-                    :disable="timesheet_store.is_loading"
-                    color="accent"
+                    :disable="timesheet_store.is_loading || has_shift_errors"
+                    :color="timesheet_store.is_loading || has_shift_errors ? 'grey-5' : 'accent'"
                     icon="upload"
                     :label="$t('shared.label.save')"
                     class="q-mr-md"
diff --git a/src/modules/timesheets/models/shift.models.ts b/src/modules/timesheets/models/shift.models.ts
index b5b082a..5b7faa3 100644
--- a/src/modules/timesheets/models/shift.models.ts
+++ b/src/modules/timesheets/models/shift.models.ts
@@ -28,7 +28,7 @@ export class Shift {
     comment: string | undefined;
     is_approved: boolean;
     is_remote: boolean;
-    error?: string;
+    has_error: boolean;
 
     constructor() {
         this.id = -1;
@@ -40,9 +40,17 @@ export class Shift {
         this.comment = undefined;
         this.is_approved = false;
         this.is_remote = false;
+        this.has_error = false;
     }
 }
 
+export interface ShiftOption {
+    label: string;
+    value: ShiftType;
+    icon: string;
+    icon_color: string;
+}
+
 export interface ShiftAPIResponse {
     ok: boolean;
     data?: {
diff --git a/src/modules/timesheets/utils/shift.util.ts b/src/modules/timesheets/utils/shift.util.ts
index 1997024..692c613 100644
--- a/src/modules/timesheets/utils/shift.util.ts
+++ b/src/modules/timesheets/utils/shift.util.ts
@@ -1,4 +1,4 @@
-import { date } from "quasar";
+import { date, patterns, type ValidationRule } from "quasar";
 import type { Shift } from "src/modules/timesheets/models/shift.models";
 
 export const isShiftOverlap = (shifts: Shift[]): boolean => {
@@ -24,3 +24,11 @@ export const isShiftOverlap = (shifts: Shift[]): boolean => {
 
   return false;
 };
+
+export const useShiftRules = (time_required_error: string) =>  {
+    const isTimeRequired: ValidationRule<string> = (time_string: string) => (!!time_string && patterns.testPattern.time(time_string)) || time_required_error;
+    
+    return {
+        isTimeRequired,
+    };
+};
diff --git a/src/stores/timesheet-store.ts b/src/stores/timesheet-store.ts
index 7aee8ea..3eae467 100644
--- a/src/stores/timesheet-store.ts
+++ b/src/stores/timesheet-store.ts
@@ -1,4 +1,4 @@
-import { ref } from 'vue';
+import { computed, ref } from 'vue';
 import { defineStore } from 'pinia';
 import { unwrapAndClone } from 'src/utils/unwrap-and-clone';
 import { timesheetApprovalService } from 'src/modules/timesheet-approval/services/timesheet-approval-service';
@@ -13,6 +13,7 @@ export const useTimesheetStore = defineStore('timesheet', () => {
     const is_loading = ref<boolean>(false);
     const pay_period = ref<PayPeriod>();
     const timesheets = ref<Timesheet[]>([]);
+    const all_current_shifts = computed(() => timesheets.value.flatMap(week => week.days.flatMap(day => day.shifts)) ?? []);
     const initial_timesheets = ref<Timesheet[]>([]);
     
     const pay_period_overviews = ref<TimesheetOverview[]>([]);
@@ -119,6 +120,7 @@ export const useTimesheetStore = defineStore('timesheet', () => {
         current_pay_period_overview,
         selected_employee_name,
         timesheets,
+        all_current_shifts,
         initial_timesheets,
         getPayPeriodByDateOrYearAndNumber,
         getTimesheetOverviews,