partial shade

In the summer, parts of the front of my house get overhead sun about 11am to 1pm but in the winter they only get sun 12 to 1pm. Is this considered part shade or full shade for landscaping purposes?

Here in UK I would call that partial shade, Full shade is no sun at any time, part shade is anything from morning sun / afternoon sun for a few hours per day, but good light is sometimes as good as full sun, the sun gives a temp and the light helps form the foliage and flowers / fruit's ect
It can be confusing at times, Here in my garden and at this time of year, I don't get much winter sun or long periods of constant daylight as in= (bright enough to grow plants that need good light in winter) however, by the time the plants / tree's/ shrubs that I do grow, most are either evergreen or have shed their leaves, so lot's of sun or bright daylight are not important, I have to smother the root areas with leaf-mould or compost to keep frost from getting to the root areas of things with more shallow roots like Rhododendrons ect.

All my other plants are perennials that by winter time and less light / sun, they are asleep under ground, The east side of my garden has a steep bank with large trees growing on it so, the Winter sun reaches part of the garden later in the day but as we don't get a lot of sunny days here in winter (Scotland) my choice of plants are able to survive that, come spring when sun is higher in the sky, there is no problem.

You don't say what you are growing by way of plants and IF you wander around your neighbourhood or vicinity close to you if you are more out in the stick, you will note how more plants than you imagine survive the lack of light in winter and as mentioned, most go into winter sleep by that time.
Hope others may give you more advice than I have but, I feel sure your plants will be fine so long as they are protected from freeze, under the soil in their dormant season. even evergreen trees / shrubs have a rest season but they keep their foliage, just either stop growing or slow it down, nature dictates that for us.
Hope all goes well, good luck and Best Regards.
WeeNel.

If it also gets quite hot in those few hours then you will probably want plants that are listed for partial shade.

However, if the temperature is not very high, even with direct sun, then plants that may be listed for full shade MIGHT be OK in that spot.

It is worth trying some of each and see how they do.

A lot of gardening is starting with some information about your area then modifying it to suit your own garden.

The amount of light when the sun is not shining on that spot makes a lot of difference too. Is there such a short period of exposure because this area is on the north side of a building (but in a wide open area? If it's because of large trees or other structures (that aren't brick,) the ground may stay cooler and I'd be more confident about including the full shade plants in your efforts. The latter kind of shade is usually more protected from winds too.