My countdown doesn't work since UPBGE switch

I’m blowing my brain up trying to fix my countdown project and need help.
countdown_timer.blend (573.8 KB)

I was also wondering how to make it trigger something when it reaches zero.

How would I add microseconds to it?
I had an event timer in mind but, the years, months, weeks, and days is a nice additional touch.
You never know.
Could come in handy somehow.

countdown_timer.blend (584.1 KB)

Thanks dude!
That helped a lot.
I appreciate it!