Three lights forming an Triangle

I remember this clearly, when I was aprox. 11 years old, I remenber withnessing together with 3 other people, 3 brigh light on the sky, And they were making a triangular shape. One on the top, and the other two on the bases.
IT was a clear night, and there were withnesses, I Im writing this, because I was reading new reports, and I saw that people elsewhere saw this same kind of formation. SO I jsut want to show, that they are visiting us from a long time…
Date of the event is approximate.  We do not know if the witness means to say that the three lights were moving across the sky, or whether they were stationary.  Also, we do not know the (apparent) size of the lights.  PD