Python ejecuta cosas a ciertas a tiempo
import datetime as DT
import time
while True:
now = DT.datetime.now()
target = DT.datetime.combine(DT.date.today(), DT.time(hour=8))
if target < now:
target += DT.timedelta(days=1)
time.sleep((target-now).total_seconds())
# do something
Bewildered Baboon