On the morning of Sunday 7th January as Mars scoots around the Sun, it will from our point of view pass very close to Jupiter and its moons. So close that with a low power lens in your telescope you’ll be able to see both in the same field of view perhaps less than 15′ apart or half the width of the Moon.
This conjunction happens whilst Mars and Jupiter are below the horizon but it’ll still be impressive after they rise for observers in the west (03.30). You’ll need to wait an hour or so until 05:00am for them to get high enough to be clear in binoculars and telescope and visible in the Southeast about 12° high. They’ll be lost to the dawn from 07:30 or so.