diff --git a/src/libs/utils.ts b/src/libs/utils.ts
index df629e0..48154cd 100644
--- a/src/libs/utils.ts
+++ b/src/libs/utils.ts
@@ -55,71 +55,6 @@ export function parseDateTimeLocalToUTC(value: string): Date | null {
 }
 
 export function nowInShanghai(): Date {
-  const now = new Date()
-  const utcStr = now.toLocaleString("en-US", { timeZone: "UTC" })
-  const utcDate = new Date(utcStr)
-  const shanghaiOffset = getTimezoneOffset("Asia/Shanghai")
-  const utcOffset = 0
-  return new Date(utcDate.getTime() + (shanghaiOffset - utcOffset))
-}
-
-export function formatDateForDatetimeLocal(date: Date): string {
-  const zoned = toZonedTime(date, TIMEZONE)
-  const year = zoned.getFullYear()
-  const month = String(zoned.getMonth() + 1).padStart(2, "0")
-  const day = String(zoned.getDate()).padStart(2, "0")
-  const hours = String(zoned.getHours()).padStart(2, "0")
-  const minutes = String(zoned.getMinutes()).padStart(2, "0")
-  return `${year}-${month}-${day}T${hours}:${minutes}`
-}
-
-function getTimezoneOffset(timezone: string): number {
-  const formatter = new Intl.DateTimeFormat("en-US", {
-    timeZone: timezone,
-    timeZoneName: "longOffset",
-  })
-  const parts = formatter.formatToParts(new Date())
-  const tzPart = parts.find((p) => p.type === "timeZoneName")
-  if (!tzPart) return 0
-  const match = tzPart.value.match(/([+-]?\d{1,2}):?(\d{2})/)
-  if (!match) return 0
-  const hours = parseInt(match[1], 10)
-  const minutes = parseInt(match[2], 10)
-  return (hours * 60 + minutes) * 60 * 1000
-}
-
-export function parseDateTimeLocalToUTC(value: string): Date | null {
-  if (!value) return null
-  const zoned = fromZonedTime(value, TIMEZONE)
-  return zoned
-}
-
-export function parseDateTimeLocalToUTC_v2(year: number, month: number, day: number, hours: number, minutes: number): Date {
-  const shanghaiTime = new Date()
-  shanghaiTime.setFullYear(year)
-  shanghaiTime.setMonth(month)
-  shanghaiTime.setDate(day)
-  shanghaiTime.setHours(hours, minutes, 0, 0)
-
-  const shanghaiOffsetMs = getShanghaiOffsetMs(shanghaiTime)
-  const utcMs = shanghaiTime.getTime() - shanghaiOffsetMs
-  return new Date(utcMs)
-}
-
-function getShanghaiOffsetMs(date: Date): number {
-  const formatter = new Intl.DateTimeFormat("en-US", {
-    timeZone: "Asia/Shanghai",
-    timeZoneName: "short",
-  })
-  const parts = formatter.formatToParts(date)
-  const tzPart = parts.find((p) => p.type === "timeZoneName")
-  if (!tzPart) return 8 * 60 * 60 * 1000
-
-  const match = tzPart.value.match(/([+-])(\d{2}):?(\d{2})/)
-  if (!match) return 8 * 60 * 60 * 1000
-
-  const sign = match[1] === "+" ? 1 : -1
-  const offsetHours = parseInt(match[2], 10)
-  const offsetMinutes = parseInt(match[3], 10)
-  return sign * (offsetHours * 60 + offsetMinutes) * 60 * 1000
+  const shanghaiOffsetMs = getShanghaiOffsetMs()
+  return new Date(Date.now() + shanghaiOffsetMs)
 }
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