Ion-datetime and predefined date in poup

I use ion-datetime, by default date empty, and placeholder draws some like “Please select date”.

But I need to open ion-datetime popup with some predefined date, and it should not be filled to ion-datetime variable, so if user just do Cancel of picker, ion-datetime variable will stay still empty, but if will decide to “Done”, predefined date will be applied to ion-datetime variable.

As i see such issues appear time by time, so may be Ionic Team will add such feature?