diff --git a/.gitignore b/.gitignore
index 912c396..5b662cb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,3 +7,4 @@ dist-ssr
 node_modules
 .idea/
 *.log
+*.7z
diff --git a/src/pages/cosmic/planet_wave/0-perday.vue b/src/pages/cosmic/planet_wave/0-perday.vue
index fdd43eb..f800ae8 100644
--- a/src/pages/cosmic/planet_wave/0-perday.vue
+++ b/src/pages/cosmic/planet_wave/0-perday.vue
@@ -8,20 +8,71 @@
   </route>
 
 <script setup lang="ts">
+import {
+  CalendarDate,
+  createCalendar,
+  DateFormatter,
+  type DateValue,
+  getLocalTimeZone,
+  toCalendar,
+} from '@internationalized/date'
 import DenseFramework from '~/components/DenseFramework.vue'
+import { cn } from '~/lib/utils'
 
 const selectedT = ref<'5' | '10' | '16'>('5')
 const selectedH = ref(50)
 const selectedRange = ref('-30')
 const selectedYear = ref('2008')
 const ranges = ['-30', '-60', '30', '60']
+const df = new DateFormatter('zh-CN', {
+  dateStyle: 'long',
+})
+const ca = createCalendar('zh-CN')
+const targetDate = ref<DateValue>()
 
+function getDayOfYear(date: Date) {
+  const start = new Date(date.getFullYear(), 0, 0)
+  // @ts-expect-error date - start
+  const diff = date - start
+  const oneDay = 1000 * 60 * 60 * 24
+  return Math.floor(diff / oneDay)
+}
+
+watch(selectedYear, () => {
+  targetDate.value = toCalendar(
+    new CalendarDate(Number.parseInt(selectedYear.value), 1, 1),
+    ca,
+  ).add({ days: Math.floor(Number.parseInt(selectedT.value) * 1.5) })
+})
+
+const minDateValue = computed(() => {
+  const currentYearBeginDate = new CalendarDate(Number.parseInt(selectedYear.value), 1, 1)
+  return toCalendar(currentYearBeginDate, ca).add({ days: Math.floor(Number.parseInt(selectedT.value) * 1.5) })
+})
+
+const maxDateValue = computed(() => {
+  const currentYearBeginDate = new CalendarDate(Number.parseInt(selectedYear.value) + 1, 1, 1)
+  return toCalendar(currentYearBeginDate, ca).subtract({ days: Math.floor(Number.parseInt(selectedT.value) * 1.5) })
+})
+
+onMounted(() => {
+  targetDate.value = toCalendar(
+    new CalendarDate(Number.parseInt(selectedYear.value), 1, 1),
+    ca,
+  ).add({ days: Math.floor(Number.parseInt(selectedT.value) * 1.5) })
+})
 const fetchUrl = computed(() => {
   const query = new URLSearchParams()
+  if (!targetDate.value) {
+    return ''
+  }
+  const targetDay = getDayOfYear(targetDate.value.toDate(getLocalTimeZone()))
+  const startDay = targetDay - Math.floor(1.5 * Number.parseInt(selectedT.value))
   query.set('T', selectedT.value)
   query.set('target_h', selectedH.value.toString())
   query.set('target_lat', selectedRange.value)
   query.set('year', selectedYear.value)
+  query.set('start_day', startDay.toString())
   return `/cosmic/render/planet_wave/perday?${query}`
 })
 </script>
@@ -87,5 +138,33 @@ const fetchUrl = computed(() => {
         </SelectGroup>
       </SelectContent>
     </Select>
+    <Label>日期</Label>
+    <Popover>
+      <PopoverTrigger as-child>
+        <Button
+          variant="outline"
+          :class="cn(
+            'w-full justify-start text-left font-normal',
+            !targetDate && 'text-muted-foreground',
+          )"
+        >
+          <span i-md-calendar />
+          {{ targetDate ? df.format(targetDate.toDate(getLocalTimeZone())) : "选择日期" }}
+        </Button>
+      </PopoverTrigger>
+      <PopoverContent class="w-auto p-0">
+        <!-- @ts-expect-error dsa -->
+        <Calendar
+          v-model="targetDate " initial-focus
+          :is-date-disabled="(date:DateValue) => date < minDateValue || date > maxDateValue"
+          :prevent-deselect="true"
+        />
+      </PopoverContent>
+    </Popover>
+    <div>
+      拟合起始日期 {{ targetDate?.subtract({ days: Math.floor(1.5 * Number.parseInt(selectedT)) }) }}
+      <br>
+      拟合结束日期 {{ targetDate?.add({ days: Math.floor(1.5 * Number.parseInt(selectedT)) }) }}
+    </div>
   </DenseFramework>
 </template>
diff --git a/src/pages/saber/planet_wave/0-perday.vue b/src/pages/saber/planet_wave/0-perday.vue
index 98c0ed3..3bd9fc0 100644
--- a/src/pages/saber/planet_wave/0-perday.vue
+++ b/src/pages/saber/planet_wave/0-perday.vue
@@ -51,12 +51,12 @@ watch(() => selected.year, () => {
 
 const minDateValue = computed(() => {
   const currentYearBeginDate = new CalendarDate(Number.parseInt(selected.year), 1, 1)
-  return toCalendar(currentYearBeginDate, ca).add({ days: Number.parseInt(selected.T) * 1.5 })
+  return toCalendar(currentYearBeginDate, ca).add({ days: Math.floor(Number.parseInt(selected.T) * 1.5) })
 })
 
 const maxDateValue = computed(() => {
   const currentYearBeginDate = new CalendarDate(Number.parseInt(selected.year) + 1, 1, 1)
-  return toCalendar(currentYearBeginDate, ca).subtract({ days: Number.parseInt(selected.T) * 1.5 })
+  return toCalendar(currentYearBeginDate, ca).subtract({ days: Math.floor(Number.parseInt(selected.T) * 1.5) })
 })
 
 const ranges = [
@@ -70,7 +70,7 @@ onMounted(() => {
   targetDate.value = toCalendar(
     new CalendarDate(Number.parseInt(selected.year), 1, 1),
     ca,
-  ).add({ days: Number.parseInt(selected.T) * 1.5 })
+  ).add({ days: Math.floor(Number.parseInt(selected.T) * 1.5) })
 })
 
 const queryUrl = computed(() => {
@@ -79,7 +79,7 @@ const queryUrl = computed(() => {
     return ''
   }
   const targetDay = getDayOfYear(targetDate.value.toDate(getLocalTimeZone()))
-  const startDay = targetDay - 1.5 * Number.parseInt(selected.T)
+  const startDay = targetDay - Math.floor(1.5 * Number.parseInt(selected.T))
   q.set('year', selected.year)
   q.set('T', selected.T.toString())
   q.set('k', selected.k.toString())
@@ -176,9 +176,9 @@ const queryUrl = computed(() => {
       </PopoverContent>
     </Popover>
     <div>
-      拟合起始日期 {{ targetDate?.subtract({ days: 1.5 * Number.parseInt(selected.T) }) }}
+      拟合起始日期 {{ targetDate?.subtract({ days: Math.floor(1.5 * Number.parseInt(selected.T)) }) }}
       <br>
-      拟合结束日期 {{ targetDate?.add({ days: (1.5 * Number.parseInt(selected.T)) }) }}
+      拟合结束日期 {{ targetDate?.add({ days: Math.floor(1.5 * Number.parseInt(selected.T)) }) }}
     </div>
   </DenseFramework>
 </template>