I-Park will mark the statewide celebration with guided hikes, live Celtic music, art installations, crafts and pollinator garden programming in East Haddam.
More than 150 Lyme-Old Lyme students in grades K-12 will showcase their artwork at the Lymes' Youth Service Bureau. An opening reception takes place Thursday afternoon.
The event will include the Deep River Junior Ancients Fife & Drum Corps, an historic postcard slideshow and exhibits celebrating the country's 250th anniversary.
The undefeated girls tennis team capped a perfect regular season with wins over Fitch, H-K and Waterford, while baseball rallied for a 4-3 extra-inning win over Granby.