if you are dancing beginning bronze, you can pretty much bank on that....also if start time is 8 and your first heat is #12....you can pretty much plan on dancing at 8:24(2 minutes per heat)....and the rule is usually that you be in the ballroom 1/2 an hour in advance of your heat time....now, the earlier in the day, the less likely that they are running ahead of time...but it is important to note that they can run your heat any time inside of that half hour