The major meteor showers have
The major meteor showers have similar timing every year across the Northern Hemisphere--so you can reference the chart above. It would be best to set the scene in August as the Perseids are a major shower that people most always see. Of course, you may also want to check the Weather History that night (was it a clear night without clouds?) and the Moon Phase Calendar (as you want a dark night and a full Moon can drown out shooting stars)!