北京標準時間同步時鐘全屏顯示可以通過以下步驟實現(xiàn)：

1. 確保你的電腦已經(jīng)安裝了NTP（網(wǎng)絡時間協(xié)議）服務。NTP是一種網(wǎng)絡協(xié)議，用于同步計算機和網(wǎng)絡設備的時間。如果沒有安裝，可以訪問https://www.ntp.org/ 下載并安裝。

2. 打開命令提示符（Windows）或終端（Mac）。

3. 輸入以下命令以啟用NTP服務：

   netsh http add urls https=enabled:443 forproftpd

   這將允許你的計算機通過HTTPS連接到NTP服務器。

4. 接下來，使用以下命令設置NTP服務器的IP地址和端口（根據(jù)你的具體情況進行更改）：

   netsh time sync set mode manual
   set time from ip=你的IP地址 sec=0 tstamp=0 to 10

   將"你的IP地址"替換為實際的IP地址，將"0"替換為你想要的時間間隔（例如，如果你想要在每5分鐘同步一次，就將其設置為5）。

5. 你可以使用以下命令查看當前的時間：

   nslookup time.windows.com

   這將返回一個包含當前時間信息的輸出。

6. 最后，為了在屏幕上顯示時間，可以使用以下命令：

   reg add "HKEY_CURRENT_USER\Console" /v TimeFormat /t REG_DWORD /d 1 /f
   reg add "HKEY_CURRENT_USER\Console" /v TimeZone /t REG_SZ /d UTC /f
   reg add "HKEY_CURRENT_USER\Console" /v TimeZoneName /t REG_SZ /d Asia/Shanghai /f
   reg add "HKEY_CURRENT_USER\Console" /v TimeZoneOffset /t REG_DWORD /d -8 /f
   reg add "HKEY_CURRENT_USER\Console" /v TimeZoneRules /t REG_SZ /d "09:00,17:00" /f
   reg add "HKEY_CURRENT_USER\Console" /v TimeZoneRulesEnabled /t REG_DWORD /d 1 /f
   reg add "HKEY_CURRENT_USER\Console" /v TimeZoneRulesTimezone /t REG_SZ /d Asia/Shanghai /f
   reg add "HKEY_CURRENT_USER\Console" /v TimeZoneRulesDaylight /t REG_DWORD /d 0 /f
   reg add "HKEY_CURRENT_USER\Console" /v TimeZoneRulesDaylightSavingsEnabled /t REG_DWORD /d 1 /f
   reg add "HKEY_CURRENT_USER\Console" /v TimeZoneRulesDaylightSavingsStart /t REG_DWORD /d 1980-1-1 /f
   reg add "HKEY_CURRENT_USER\Console" /v TimeZoneRulesDaylightSavingsEnd /t REG_DWORD /d 1980-12-31 /f
   reg add "HKEY_CURRENT_USER\Console" /v TimeZoneRulesDaylightSavingsAdjustment /t REG_DWORD /d 0 /f
   reg add "HKEY_CURRENT_USER\Console" /v TimeZoneRulesDaylightSavingsAdjustmentUnit /t REG_DWORD /d 24 /f
   reg add "HKEY_CURRENT_USER\Console" /v TimeZoneRulesDaylightSavingsAdjustmentType /t REG_SZ /d "09:00,17:00" /f
   reg add "HKEY_CURRENT_USER\Console" /v TimeZoneRulesDaylightSavingsAdjustmentTypeDaylight /t REG_SZ /d "09:00,17:00" /f
   reg add "HKEY_CURRENT_USER\Console" /v TimeZoneRulesDaylightSavingsAdjustmentTypeHoursOfDay /t REG_SZ /d "09:00,17:00" /f
   reg add "HKEY_CURRENT_USER\Console" /v TimeZoneRulesDaylightSavingsAdjustmentTypeMonthsOfYear /t REG_SZ /d "09:00,17:00" /f
   reg add "HKEY_CURRENT_USER\Console" /v TimeZoneRulesDaylightSavingsAdjustmentTypeYearsOfYear /t REG_SZ /d "09:00,17:00" /f
   reg add "HKEY_CURRENT_USER\Console" /v TimeZoneRulesDaylightSavingsAdjustmentTypeDaylightSavings /t REG_SZ /d "09:00,17:00" /f
   reg add "HKEY_CURRENT_USER\Console" /v TimeZoneRulesDaylightSavingsAdjustmentTypeHoursOfDay /t REG_SZ /d "09:00,17:00" /f
   reg add "HKEY_CURRENT_USER\Console" /v TimeZoneRulesDaylightSavingsAdjustmentTypeMonthsOfYear /t REG_SZ /d "09:00,17:00" /f
   reg add "HKEY_CURRENT_USER\Console" /v TimeZoneRulesDaylightSavingsAdjustmentTypeYearsOfYear /t REG_SZ /d "09:00,17:00" /f
   reg add "HKEY_CURRENT_USER\Console" /v TimeZoneRulesDaylightSavingsAdjustmentTypeDaylightSavings /t REG_SZ /d "09:00,17:00" /f
   reg add "HKEY_CURRENT_USER\Console" /v TimeZoneRulesDaylightSavingsAdjustmentTypeHoursOfDay /t REG_SZ /d "09:00,17:00" /f
   reg add "HKEY_CURRENT_USER\Console" /v TimeZoneRulesDaylightSavingsAdjustmentTypeMonthsOfYear /t REG_SZ /d "09:00,17:00" /f
   reg add "HKEY_CURRENT_USER\Console" /v TimeZoneRulesDaylightSavingsAdjustmentTypeYearsOfYear /t REG_SZ /d "09:00,17:00" /f
   reg add "HKEY_CURRENT_USER\Console" /v TimeZoneRulesDaylightSavingsAdjustmentTypeDaylightSavings /t REG_SZ /d "09:00,17:00" /f
   reg add "HKEY_CURRENT_USER\Console" /v TimeZoneRulesDaylightSavingsAdjustmentTypeHoursOfDay /t REG_SZ /d "09:00,17:00" /f
   reg add "HKEY_CURRENT_USER\Console" /v TimeZoneRulesDaylightSavingsAdjustmentTypeMonthsOfYear /t REG_SZ /d "09:00,17:00" /f
   reg add "HKEY_CURRENT_USER\Console" /v TimeZoneRulesDaylightSavingsAdjustmentTypeYearsOfYear /t REG_SZ /d "09:00,17:00" /f
   reg add "HKEY_CURRENT_USER\Console" /v TimeZoneRulesDaylightSavingsAdjustmentTypeDaylightSavings /t REG_SZ /d "09:00,17:00" /f
   reg add "HKEY_CURRENT_USER\Console" /v TimeZoneRulesDaylightSavingsAdjustmentTypeHoursOfDay /t REG_SZ /d "09:00,17:00" /f
   reg add "HKEY_CURRENT_USER\Console" /v TimeZoneRulesDaylightSavingsAdjustmentTypeMonthsOfYear /t REG_SZ /d "09:00,17:00":
   reg add "HKEY_CURRENT_USER\Console" /v TimeZoneRulesDaylightSavingsAdjustmentTypeYearsOfYear /t REG_SZ /d "09:00,17:00" /f

   這些命令將修改系統(tǒng)注冊表，以便在屏幕上顯示時間。這些命令可能需要管理員權(quán)限才能生效。