“The extended school closures mean students will now be out of school for about six months — if classes resume in September. It is believed to be the longest-ever statewide shuttering of schools in Massachusetts, eclipsing what many considered to be a record set more than four decades ago when the Blizzard of ’78 caused widespread school closures for much of February.”
(https://www.bostonglobe.com/2020/04/21/nation/coronavirus-boston-massachusetts-april-21/)