Where does winter happen?

Winter occurs everywhere in the NH, officially between December 21st/22nd up until March 21st/22nd every year. So, yes, this would include both Texas and Florida,given both are in the Northern Hemisphere, I'm assuming that is what you were trying to ask in your question.

If you are asking where does winter weather happen more? Texas, given its a more northern state than Florida is! The city with the most annual snowfall is Amirillo which sees 18 inches of snow each winter... 

Yes, winter DOES happen in Texas, Florida and New Orleans in Louisiana. It's just more?subtle in Louisiana and Florida. The deciduous trees leaves change color and  fall to the ground, but some of those leaves may stay on the tree until new. Seeds and leaves push them off. I mean red or swamp maples. February is usually when red maples bloom. Lacebark elms lose most of their leaves just like they do in central Mimosa trees lose their leaves. Snow on the north shore of Lake Pontchartrain isn't that unusual, but if the south Shore has snow flurries people bananas crazy, especially kids. No obe knows how to drive or walk.

Ecuador...........

Winter occurs in the entire hemisphere that's tilted away from the sun. This changes as the earth orbits the sun, which takes a year. 

At the moment, it's the North Hemisphere's turn, so everywhere north of the equator, which includes but is not limited to, North America and the northern part of South America, North Africa, Europe, Asia (except Indonesia) and Russia. 

The way the winter season manifests in different regions can vary dramatically. Weather systems and climate are very sophisticated dynamic energy systems. 

But generally speaking, the more north you are and the more you are tilting away from the sun, the colder you will be.