First Days of School for Connecticut:
- Andover: Grades 7&9- September 8; Grades 8,10,11, &12- September 9
- Ansonia: August 26, 2021
- Ashford: September 3,2021
- Avon: August 30, 2021
- Barkhamsted: August 30, 2021
- Beacon Falls: September 1, 2021
- Berlin: August 26, 2021
- Bethany: August 30,2021
- Bethel: August 30,2021
- Bethlehem: September 7,2021
- Bloomfield: September 2, 2021
- Bolton: September 1, 2021
- Bozrah: August 26, 2021
- Branford: September 8, 2021
- Bridgeport: August 30, 2021
- Bridgewater: August 31, 2021
- Bristol: August 30, 2021
- Brookfield: August 31, 2021
- Brooklyn: September 1, 2021
- Burlington: August 25, 2021
- Canaan: August 30, 2021
- Canterbury: August 31, 2021
- Canton: August 30, 2021
- Chaplin: August 25, 2021
- Cheshire: August 31, 2021
- Chester: August 26, 2021
- Clinton: September 1, 2021
- Colchester: September 2, 2021
- Colebrook: August 30, 2021
- Columbia: September 3, 2021
- Cornwall: August 30, 2021
- Coventry: September 3, 2021
- Cromwell: August 30, 2021
- Danbury: August 30, 2021
- Darien: August 30, 2021
- Deep River: August 26, 2021
- Derby: September 7, 2021
- Durham: September 1, 2021
- East Granby: August 25, 2021
- East Haddam: August 30, 2021
- East Hampton: August 30, 2021
- East Hartford: August 25, 2021
- East Haven: August 31, 2021
- East Lyme: August 26, 2021
- East Windsor: August 30, 2021
- Eastford: August 30, 2021
- Easton: September 1, 2021
- Ellington: September 2, 2021
- Enfield: September 7, 2021
- Essex: August 26, 2021
- Fairfield: August 30, 2021
- Farmington: August 30, 2021
- Franklin: September 1, 2021
- Glastonbury: August 25,2021- Grades 7-12; August 26,2021- Grades K-6
- Goshen: Student phase in Day 1- August 30; Day 2- August 31
- Granby: August 26, 2021
- Greenwich: September 1, 2021
- Griswold: August 30, 2021
- Groton: September 7, 2021
- Guilford: September 8, 2021
- Haddam: September 1, 2021
- Hamden: August 30, 2021
- Hampton: August 25, 2021
- Hartford: September 9, 2021
- Hartland: September 1, 2021
- Harwinton: August 25, 2021
- Hebron: The first day of school has been shifted from September 3 to September 8 for grade 7 & 9 students and to September 9 for grade 8, 10, 11 & 12 students.
- Kent: August 30, 2021
- Killingly: Grades K-9- August 26; Grades 10-12 -August 27
- Killingworth: September 1, 2021
- Lebanon: September 1, 2021
- Ledyard: September 2, 2021
- Lisbon: August 30, 2021
- Litchfield: Student phase in Day 1- August 30; Day 2- August 31
- Lyme: August 26, 2021
- Madison: August 30, 2021
- Manchester: Grades K-5,7,9- September 8; Grades 6,8,10-12-September 9
- Mansfield: September 3, 2021
- Marlborough: The first day of school has been shifted from September 3 to September 8 for grade 7 & 9 students and to September 9 for grade 8, 10, 11 & 12 students.
- Meriden: September 1, 2021
- Middlebury: August 31, 2021
- Middlefield: September 1, 2021
- Middletown: September 9, 2021
- Milford: September 1, 2021
- Monroe: August 26, 2021
- Montville: August 30, 2021
- Morris: Student phase in Day 1- August 30; Day 2- August 31
- Naugatuck: September 1, 2021
- New Britain: September 1, 2021
- New Canaan: August 30, 2021
- New Fairfield: August 30, 2021
- New Hartford: August 30, 2021
- New Haven: August 30, 2021
- New London: September 7, 2021
- New Milford: August 25, 2021
- Newington: August 26, 2021
- Newtown: August 30, 2021
- Norfolk: August 30, 2021
- North Branford: September 1, 2021
- North Canaan: August 30, 2021
- North Haven: September 1, 2021
- North Stonington: August 25, 2021
- Norwalk: August 30, 2021
- Norwich: August 30, 2021
- Old Lyme: August 26, 2021
- Old Saybrook: August 31, 2021
- Orange: August 30, 2021
- Oxford: September 2, 2021
- Plainfield: September 1, 2021
- Plainville: September 2, 2021
- Plymouth: August 30, 2021
- Pomfret: August 26, 2021
- Portland: August 30, 2021
- Preston: August 30, 2021
- Prospect: September 1, 2021
- Putnam: August 26, 2021
- Redding: September 1, 2021
- Ridgefield: August 30, 2021
- Rocky Hill: September 2, 2021
- Roxbury: August 31, 2021
- Salem: August 30, 2021
- Salisbury: August 30, 2021
- Scotland: August 25, 2021
- Seymour: August 27, 2021
- Sharon: August 30, 2021
- Shelton: September 8, 2021
- Sherman: August 30, 2021
- Simsbury: September 1, 2021
- Somers: September 7, 2021
- South Windsor: September 1, 2021
- Southbury: August 31, 2021
- Southington: September 2, 2021
- Sprague: August 30, 2021
- Stafford: August 30, 2021
- Stamford: August 30, 2021
- Sterling: August 25, 2021
- Stonington: September 8, 2021
- Stratford: September 2, 2021
- Suffield: September 1, 2021
- Thomaston: September 1, 2021
- Thompson: August 25, 2021
- Tolland: September 8, 2021
- Torrington: September 2, 2021
- Trumbull: August 31, 2021
- Union: UNKNOWN
- Vernon: September 1, 2021
- Voluntown: September 1, 2021
- Wallingford: August 30, 2021
- Warren: Student phase in Day 1- August 30; Day 2- August 31
- Washington: August 31, 2021
- Waterbury: August 31, 2021
- Waterford: September 1, 2021
- Watertown: August 26, 2021
- West Hartford: September 1, 2021
- West Haven: August 30, 2021
- Westbrook: September 1, 2021
- Weston: August 31, 2021
- Westport: August 31, 2021
- Wethersfield: September 2, 2021
- Willington: September 3, 2021
- Wilton: August 30, 2021
- Winchester: August 31, 2021
- Windham: September 3, 2021
- Windsor: August 30,2021
- Windsor Locks: September 2, 2021
- Wolcott: August 25, 2021
- Woodbridge: August 30, 2021
- Woodbury: September 7,2021
- Woodstock: August 30, 2021