When you create a new report, a date time is inserted into the Report Description by default. The date comes from the system date on the Yellowfin Server.
So, if the Yellowfin server is in China, and you're using Yellowfin on your laptop in Australia, the date in the report description will be the time where the server is located in China.
The same is true for 'creation date, modified date', or any other date that is automatically populated.