Hello,
Log in to EG8145V5 WebUI.
1. Click Advanced > Application tab, and choose Time Setting in the navigation tree on the left. In the pane on the right, set the parameters related to the system time, including the SNTP server, time zone, and daylight saving time (DST).

2. Click Apply.
Other friends on the Forum have also consulted about changing the system time of the EG8145V5. However, this tab is not displayed on the device page in the uploaded screenshot.
I have just confirmed that the system time of the EG8145V5 can be changed only after the administrator account has logged in.
Due to the restrictions imposed by the Forum, I cannot provide you with the admin account and password.
You are advised to contact the device provider or ISP to obtain the administrator account and password.
Thanks!