Summer = The Scorching/Scorch
Autumn = The Wilting/Wilt
Winter = The Frosting/Frost
Spring = The Blooming/Bloom
The year in-game is canonically 2525. Estrea is geographically in the Southern Hemisphere, and the Eden Calendar aligns perfectly with the real world calendar. Each day starts at 9:30AM AEST.
eg. The 8th of Thaw is the 8th of August.
The Eden Calendar has it's own holidays and festivals that are mostly inspired by different deities. Details about them as they're celebrated can be found in Events.