Seasonal Lands

Tiamat said that our world, the cradle that bore us, was unique in it's function when compared to many of the worlds she had seen. Or so she says in her earliest accounts that she carved in stone, before she took to teaching humanity.
Particularly, in the way that our seasons function, or rather don't function at all.
That is to say, areas of the world are "seasonally locked", resulting in areas that are always in the warmth of spring and summer, and others that are perpetually buried in snow. To us, this is normal, to Mother Tiamat it was an oddity, but a good one in her eyes.
According to Dracanograph #83 (the Lifmoor Dracanograph), the vast majority of worlds she had seen before arriving here had an even spread of seasons, with all lands equally touched, or no seasons at all with one dominating at all times. Only here had she found the seasons so scattered and consistent.
Traditionally, the different varieties have been labeled as such, baring differences for culture and language:
Summerland: The extremes of warm weather, giving the sun plenty of time to make an appearance in the clear, open, and blue sky. It gets little rain, generally leaving Summerlands on the brink of drought without careful irrigation and water planning.
Springland: The far less harsh sibling of the Summerlands. Springlands tend to be, while still warm, far more comfortable and lush with life. They regularly get rain and traditionally have served as the best of farmland the world over.
Autumnlands: The mirror image of the Springlands, but under the domain of winter. Tends to be bracingly cool, but still warm enough for particular crops to thrive. More at risk of frost than true snow. Drier than Springlands as a consequence, but not too debilitating.
Winterlands: The harshest of temperatures, well below the point of danger from the cold and storm. Almost always near buried in snow, with biting winds and cloudy weather.
There is some variation within these areas, if that did not go without saying. Their own, internal, seasonal cycles, if you will. Summerlands will have a time of the year where their temperatures less harsh and they get a deserved respite from the sun with some cloud cover, and the Winterlands gain a chance to clear their streets of snow for a handful of months before the blizzards begin again. They still maintain their core traits, that is undeniable, but their aren't completely monolithic either.
It also bares noting that none of the seasonal lands are synched to each other. They all have their internal 'seasonal' changes at different times of the year, resulting in some minor differences, which just confuses the topic more. An already confounding topic that is further confused by such an addition, and which no modern hypothesis has managed to cover all sufficient angles.

Type

Natural

The season a tract of land is is not locked, despite popular belief. They can, in fact, change over time. 
The process is long and arduous, and most will not see it complete it's change within the span of a single lifetime, but the lands will, innevitably change.
It is not worth sparing a thought to this change, however, given the time frame it operates upon. Not to mention that there is little rhyme or reason to when or why the seasons in an are might change like this, so to worry about it would be a fools errand, unless you seek academic catharsis.