How to change date from command line on Ubuntu 20.04

Question

For Ubuntu 20.04 desktop PC I can change date and time from the UI by using these steps,

1. Click Date & Time in the sidebar to open the panel.
2. If I have the Automatic Date & Time switch set to on, my date and time should update automatically if I have an internet connection. To update date and time manually, set this to off.
3. Click Date & Time, then adjust the time and date.

What I tried from terminal:

sudo date --set="2020-08-15"

But it changed and revert automatically within a second (maybe because Automatic Date and Time option are enabled). So for an internal experiment, I need to change the date back to a specific date using the command line or bash file. How to do that properly?