If you enjoy hunting for unique finds, Weatherford's First Monday Trade Days is a real gem.   🛍️ This open-air market has been going strong since the mid-1800s, and it's one of the oldest in Texas. Photo of the Weatherford First Monday Trade Days, 1939, by Russell Lee via the FSA. It happens the weekend before the first Monday of most months, running Friday through Sunday from 9 a.m. to 4 p.m. at Heritage Park on Santa Fe Drive. You'll find hundreds of vendors selling antiq