The IANA time zone database identifier for Massachusetts is America/New_York.5
Time in New England states: Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont
"Uniform Time". US Department of Transportation. 13 February 2015. Archived from the original on 24 August 2018. Retrieved 24 August 2018. The U.S. Department of Transportation (DOT) oversees the Nation's time zones and the uniform observance of Daylight Saving Time. The oversight of time zones was assigned to DOT because time standards are important for many modes of transportation. https://www.transportation.gov/regulations/time-act ↩
"NOAA Solar Calculator". noaa.gov. Retrieved March 9, 2019. https://www.esrl.noaa.gov/gmd/grad/solcalc/ ↩
"Is it time for Mass. to move to a new time zone? - The Boston Globe". BostonGlobe.com. 2016-08-11. Retrieved 2017-03-17. https://www.bostonglobe.com/business/2016/08/11/time-for-mass-move-new-time-zone/64Q51rTWormBPTH7Ggds2O/story.html ↩
"Report on switch to Atlantic Time Zone OK'd". Lowell Sun. 2017-11-02. Retrieved 2018-01-17. http://www.lowellsun.com/todaysheadlines/ci_31422442/report-switch-atlantic-time-zone-okd ↩
"Time Zone Database". www.iana.org. https://www.iana.org/time-zones ↩