Thanks for the reply Fluff.
that may be the some what system glitch.
becuase there is 4:30 hours difference in Australia and India time, while it shows around 12 hours difference in time.
Another thing is that he downloaded 6 docs at that time and first 3 came with 05/08/2023 and another came with 05/09/2023
at that time he was trying Ctrl + ; to indert date in excel and was getting 05/09/2023 and after a while he started to get 05/08/2023.
Still confused with that strange behaviour of system.