A state holiday, since 1980 is upon on. This weekend East Texans will celebrate Juneteenth, which enforced the emancipation of slaves in Texas. The parade in Tyler is schedule to begin at 10:00 a.m. at the corner of Glenwood and Martin Luther King Jr. Blvd. The Longview parade also begins at 10:00 a.m. This one at the intersection of Martin Luther King Jr. Blvd. and I-20.