Aye, almost any events/states you want to create will rely on values or conditions in some way or other.
Simplest method for displaying values is by including them inside of a display text/display object text. Check the 2nd example on this page
Day/night/season cycle is more complicated & will depend on how you intend to go about achieving it. One VS user has used shaders to affect their scenes colors to simulate day/night. Alternatively you can go the traditional route & draw/paint different instances of each scene to cover day/night/seasons. You can use the particle system to add in fog, clouds, rain, snow, falling leaves, etc.
I'm not going to go into how to sort any of it out, just informing you what's possible.