The first day of Fall is on Saturday, September 22. The equinox occurs at 9:54 PM EDT, this is when the earth’s equator passes the center of the sun.
Theoretically this would mean there is the same amount of daylight in the both of the Earth’s hemispheres. In Baltimore, our sunrise is at 6:54 AM and sunset is at 7:03 PM on Saturday. Meaning our day length is 12 hours and 9 minutes.