Need an aural reminder on my phone

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http://androidforums.com – I'm getting there with Android, but still not as familiar with it as many on here. What I need may already be on the phone, but if it is, I can't locate it. Or, what I'm asking for may best be served by an app, in which case, I'd be very grateful for any suggestions. OK. I use a calendar (aCalendar), but there are times when I want an aural reminder on my phone. So, tomorrow night at 8.00pm (for example), I want my phone to make a noise and flash up a written reminder. Really grateful for any help. (General)