mandarin question about 天 vs. 季 when referring to seasons, are they interchangeable or is it one of those cases where you use one for speaking and one for writing?

Question

Vocaloid · Answer

Vocaloid · Answer

@mhchen @Angle @kittybasil whenever you get a chance

Angle · Answer

Major seasons use tian (dong tian, chun tian, xia tian, qiu tian, etc)
Daily weather uses tian (yin tian - cloudy)
Climate seasons uses ji (rainy season, flood season, flowering season)
some none weather related terms also use ji (busy season, off season, sports season)

Vocaloid · Answer

thanks c:

kittybasil · Answer

The second one, "ji" usually refers to a period of time that is associated with something, such as the sports and flowering examples mentioned by Angle.

Generally "tian" is referred to concrete ideas like seasons or weather, because they are generally a universally accepted.

`Edit: I just asked my family and apparently using "ji" to describe the seasons (fall, summer etc) is actually about the same rate as "tian" ... now I'm confused`
@Angle x'D Help please