To be honest, while I like the idea of changing season names (though I suggest instead of "warm" season making it the "bright" or "light" season in contrast to the "dark"), I generally dislike changing the names of week days. Maybe it's just because I constantly got confused by the practice as a kid, but I think it's needless complexity. You could change symbology, such as every Monday having a morning hour before breakfast dedicated to worship of Varya, but changing their names seems too confusing to me.

Also, perhaps we change spring and fall to be the dawn and dusk seasons? The most major difference in this world is the light hours, so perhaps we could keep that as a strong thematic in the seasons.