By default, I need to input Date by entering DD/MM/YY. Can I change it in another way, eg. YY/DD/MM??

I think that you have to enter a date in the DD/MM/YYYY format. However, you can display the data anyway you want by going to the "date properties" and changing it there.

If you are looking to input the date a different way, you can have three separate fields for month, day and year and then use the date funtion to assemble them for storage.

Thanks for your suggestions