Lost four to five hours

Not sure of year, as so long ago, but was Spring--around 1984 to 87. My brother, his wife and my now ex-wife were driving across the desert from Las Vegas to Palm Springs early morning and encountered a huge craft hovering fifty feet off the desert. Our wifes were screaming and locked the doors, but then everything gets fragmented after that.. We do remember watching it later- way up in the sky, pulsating off and on and zipping back and forth across the sky between the mountains- off in the distance. It zipped out into the middle of the sky waited a few seconds and zipped away, just as a jet zoomed by where it was a few seconds before... We were all very upset, confused, dazed and stopped at the first pay phone. My brother and I had a hard time getting both of us into the booth and getting the door closed to get the light on so we could read the phone book.(too scared to actually complete call).. We later freaked out when we were unpacking at the first motel, when we realized that we had left early so we could have lunch in Palm Springs-----so it shouldn't have been dark... Fragmented memories of more and fear ever since.
Date is approximate.  PD