Day 26:
Since I was really annoyed yesterday evening because of all the things with the timer and other stuff, I was debugging the spawner & timers a lot today in the morning to see what is triggering at which time and which variables are changing. And voila... things became more obvious in the morning.
Because of that I successfully implemented in the evening the timer & time values but also the feature to call waves early which wasn't really on my list for today, but it was really easy :O
Thus I am more than enthusiastic about what I have achieved today:
Maybe at some point I have to work on both things again, but this is another task on another day far, far away...
Day 27 ToDo:
After this really successful day 26, I'll take day 27 off to gain more power and strength :O