Your exact birth time gives you the most accurate Human Design chart, so it’s worth checking your birth certificate or hospital records if you can.
If you still don’t know your time, try looking at a few time windows (morning, midday, evening) and notice what changes. Your Type, Strategy, and often your Authority stay the same throughout the day, so you’ll still gain clarity and direction from the audio series.
If your Profile or other key elements shift significantly, you may want to work with a professional who can help narrow your time based on life patterns (birth time rectification).