I was looking to implement a time system in one of my project and stumbled upon your demo, I've played around with it and it's seem to work great.
Potential bug:
I've seem there are way to get stuck when talking to Joe outside in winter
If you 'say nothing for now' thIe game just freeze, it seem that because instead of a break loop there a new loop started. Seem ok in other season.
Not sure if it me but the time of the variable seem to be share between save file, it might be the way I've copied all the variable into my project.
Use case:
I'll try to find a way to display the time at all time via a hud or something, for now what I've got is a item that call a common event that display the time like the clock in your demo.
I've managed to create a parallel common event that send the player to his bed at 2AM (kind of like stardew valley), work fine for now except for time skip (like sleeping in bed)
My ultimate goal with that is at the end of the day there some management result that would be show to the player via menu, text box and picture. Like a stardew valley when you send stuff in the bin or a item shop where you left somebody for the day to run the shop.
I wonder if there a way to stop the time in certain situation, like when in menu or during cutscene.
Another thing I'll probably change down the line is the way the bed work, I want it to just wake up the next day at 6AM, but this is just a personnal preference..
I haven't played much with the season and weather yet, but it look promissing.