most liekly due to uneven road surfaces and lack of grip, one of your tyres gripped up front and locked up which (without ABS) will act like a pivot and spin your car.
the only thing you can do is upgrade your tyres to a SUPER soft compound, ensure that all pads are made of the same compound, ensure your discs & drums aren't past their tollerance levels & to drive slower in winters as our roads are notorious for skidding as they have almost 0 grip for cars with cold or old tyres.