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You can create charts for the possible dates, times, and locations you have for an event, and try to schedule it for the chart that is most auspicious.
You’ll want to try to avoid a retrograde 1st house ruler and retrograde house ruler for the house ruling the type of event, and you’ll want to see a positive planetary ruler and ruling house to increase the positive energy.
If they’re at critical degrees, conjunct difficult fixed stars, making hard aspects to Saturn, Uranus, Neptune, or Pluto, or Venus or the 5th house ruler are retrograde, this would show that it probably won’t go very well.
If they make easier aspects, or you have the Sun or Jupiter involved, this can show it goes better.
You can take a look at the ruler of whatever the event is in the chart, both by planet and by house, and get more information about the event.