Hello rade_radumilo,
To help better assist you, can you let us know if the time only appears incorrect in the Clock widget?
If the time is incorrect on your device, but you're unable to change it, please check out this link, as it has some suggestions that may help: If you can't change the time or time zone on your Apple device
Check your settings
Check if you still need help after each step.
On your iPhone, iPad, or iPod touch
1. Make sure that you have the latest version of iOS or iPadOS.
2. Turn on Set Automatically1 in Settings > General > Date & Time. This automatically sets your date and time based on your time zone.
3. If a message appears saying that updated time zone information is available, restart your device and any paired Apple Watch.
4. Allow your device to use its current location to determine the correct time zone. To do this, go to Settings > Privacy > Location Services > System Services and turn on Setting Time Zone.
5. Check that your device shows the correct time zone in Settings > General > Date & Time > Time Zone.
Please also check out this link, which goes over how to manage and edit widgets: How to add and edit widgets on your iPhone
How to edit your widgets
You can configure your widgets. For example, you can edit the Weather widget to see the forecast for your current location or a different location. Here’s how:
1. Touch and hold a widget to open the quick actions menu.
2. Tap Edit Widget .
3. Make your changes, then tap outside of the widget to exit.
You can also move your widgets around to put your favorites where they're easier to find. Just touch and hold a widget until it jiggles, then move the widget around on the screen.
Thanks!