Fun fact about Construct is that almost everything is possible with it if given enough interest and logical sense...
Anyway, so you want a day progression system in your game(not real time but a ingame day system), as i understand...
To do that you need a variable that counts days u can call it "Days", a variable to counts how much time a Day will last? in seconds lets say and call it "DayTime" and give it lets say a value of 3600 (3600 seconds = 60 minutes in real time, but we will make it run faster) and a text to show all that to you.
C:> If variable "DayTime" > 0 | A: > subtract from DayTime 0.2
C:> If variable "DayTime" =<0 | A: > Add to days +1
|----Trigger once while true ------- set variable DayTime to 3600
C:> everytick | A: > text set text to "Days: "& Days & "TimeLeftInDay: "& DayTime
Have fun. How you use them and where you put them, to work with your project, you have to figure it out yourself, Construct gives you the tools you need, but you have to understand how to use them(see Manual and Tutorials), and apply reasonable logic, if you do that the sky is the limit.