Hi @Tejaswini1234 ,
Do you want to disable the dates which are before today's date within the DatePicker control?
If you want to disable the dates which are before today's date within the DatePicker control, I afraid that there is no way to achieve your needs in PowerApps currently.
As an alternative solution, you could consider create a custom interactive calendar view within your app to achieve your needs.
More details about creating a interactive calendar view within PowerApps, please check the following blog:
https://blogs.msdn.microsoft.com/davidni/2016/12/13/building-an-interactive-calendar-view-with-powerapps/
In addition, I also think the Calendar Screen would also give you some help in your scenario:
After you created a interactive calendar view within your app, then you could set the DisplayMode property of the Title Label within the MonthDayGallery to following:
If(ThisItem.Value < Weekday(Today(), StartOfWeek.Monday), DisplayMode.Disabled, DisplayMode.Edit)
Then you could achieve your needs as below:
Please consider take a try with above alternative solution, then check if the issue is solved.
Best regards,
