Seasons

[Tupsi]

This is a huge technical challenge, look up the development video for The Sims 2 Seasons, and you'll see exactly why.

Nope. FFXI has seasons and even some object changes based on said seasons - For example winter months rl/game time it is more likely to snow in Rolanberry/Batallia downs and even Rolanberries scattered around changes colors iirc.

Heck even some mob based spawns/weakness/strengths based on seasons/weather patterns, so it's not a technical challenge if a 2002 PS2 game can do it.