Updating current time…
Massachusetts, USAEDT
UTC−4
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Illinois, USACDT
UTC−5
1h behind
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

8:00 am08:00 EDT (UTC-4), Oct 15, 2026 = 7:00 am07:00 CDT (UTC-5), Oct 15, 2026

Boston is 1 hour ahead of Chicago.

How the time difference changes

Normally, Boston is 1 hour ahead of Chicago. Briefly around seasonal clock changes, Boston is 2 hours ahead of Chicago or Boston and Chicago have the same time.

Typically, working hours of 9:00 am to 6:00 pm in Boston correspond to 8:00 am to 5:00 pm in Chicago.Typically, working hours of 09:00 to 18:00 in Boston correspond to 08:00 to 17:00 in Chicago.

Compare Boston time with Chicago time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

EDT (Eastern Daylight Time) is 1 hour ahead of CDT (Central Daylight Time).
8:00 am08:00 in Boston, MA, USA is 7:00 am07:00 in Chicago, IL, USA

Boston to Chicago call time
Best time for a conference call or a meeting is between 10am-6pm10:00-18:00 in Boston which corresponds to 9am-5pm09:00-17:00 in Chicago

8:00 am08:00 EDT (Eastern Daylight Time) (Boston, MA, USA). Offset UTC -4:00 hours
7:00 am07:00 CDT (Central Daylight Time) (Chicago, IL, USA). Offset UTC -5:00 hours

8:00 am08:00 Boston, MA, USA / 7:00 am07:00 Chicago, IL, USA

Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.

Hourly time comparison
Boston, MA, USAChicago, IL, USA
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23:00 previous day
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Boston Time Zone and Facts

Time Zone

Abbreviation / Offset
EDT – Eastern Daylight Time, UTC-4 (now, daylight saving time)
EST – Eastern Standard Time, UTC-5 (standard time)
Daylight Saving Time Ends
123456789101112Sunday, November 1, 2026 at 2:00 amSunday, November 1, 2026 at 02:00: clocks go back 1 hour to 1:00 am01:00 (EST). DST ends on the 1st Sunday of November each year. Also called Fall Back or Winter Time.
Daylight Saving Time Starts
123456789101112Sunday, March 14, 2027 at 2:00 amSunday, March 14, 2027 at 02:00: clocks go forward 1 hour to 3:00 am03:00 (EDT). DST starts on the 2nd Sunday of March each year. Also called Spring Forward or Summer Time.

Boston Facts

Country
USA
State
Massachusetts
Alternative Names
BOS, Baston, Bostan, Boston, Bostona, Bostonas, Bostone, Bostonia, Bostono, Bostons, Bostun, Bostún, Mushauwomuk, Old Boston, Po-su-tun, Pokekona, Pô-sṳ-tun, Shawmut, Shawmutt, Shawnnut, Totant, Tramount, Tremont, Trimountain, Trimountaine, Vostoni, Wahstoronon:ke, Wahstoronòn:ke, Wastok, bastan, bastana, bausatana, beasrraൺ, bo shi dun, boseuteon, bostan, bostana, bostʼoni, bosuton, bwstn, bwstwn, bxstan, pastan, Βοστωνη, Βοστώνη, Бостан, Бостон, Бостън, Բոստոն, באסטאן, בוסטון, بوستون, بوسطن, بوسٹن, بۆستن, ܒܘܣܛܘܢ, बस्तन, बास्टन्, बॉस्टन, बोस्टन, বস্টন, ਬੌਸਟਨ, பாஸ்டன், బోస్టన్, ಬಾಸ್ಟನ್, ബോസ്റ്റൺ, บอสตัน, བོ་སེ་ཊོན།, ဘော့စတွန်မြို့, ბოსტონი, ቦስቶን, ボストン, 波士頓, 波士顿, 보스턴
Population
653,833
Currency
Dollar (USD)
Geographic Coordinates
42° 21' N Latitude / 71° 03' W Longitude
International Dialing Code
+1

Chicago Time Zone and Facts

Time Zone

Abbreviation / Offset
CDT – Central Daylight Time, UTC-5 (now, daylight saving time)
CST – Central Standard Time, UTC-6 (standard time)
Daylight Saving Time Ends
123456789101112Sunday, November 1, 2026 at 2:00 amSunday, November 1, 2026 at 02:00: clocks go back 1 hour to 1:00 am01:00 (CST). DST ends on the 1st Sunday of November each year. Also called Fall Back or Winter Time.
Daylight Saving Time Starts
123456789101112Sunday, March 14, 2027 at 2:00 amSunday, March 14, 2027 at 02:00: clocks go forward 1 hour to 3:00 am03:00 (CDT). DST starts on the 2nd Sunday of March each year. Also called Spring Forward or Summer Time.

Chicago Facts

Country
USA
State
Illinois
Alternative Names
CHI, Cekaga, Chi-ka-ko, Chi-kâ-kô, Chicago, Chicagu, Chikago, Chykaga, Cikaga, Cikago, Cikaqo, E-Chicago, Kikako, Shikago, Sicagum, Sikago, The Windy City, Tsikago, Windy City, chikhako, cikago, cikako, shikago, shkagw, shykaghw, shykagw, shykajw, shyqgw, sikago, sikkagea, syqgw, zhi jia ge, Çikago, Çikaqo, Ĉikago, Čikaga, Čikago, Čikāga, Čėkaga, Şikago, Σικάγο, Чикаго, Чикаґо, Чыкага, Չիկագո, שיקאגא, שיקגו, شيكاجو, شيكاغو, شکاگو, شیکاگو, شیکاگۆ, ܫܝܩܓܘ, शिकागो, শিকাগো, ਸ਼ਿਕਾਗੋ, சிகாகோ, చికాగో, ಶಿಕಾಗೊ, ഷിക്കാഗോ, ชิคาโก, ရှီကာဂိုမြို့, ჩიკაგო, ሺካጎ, ᓰᖄᑯ, Ṣìkágò, シカゴ, 芝加哥, 시카고, 𐍃𐌾𐌹𐌺𐌰𐌲𐍉
Population
2,664,452
Currency
Dollar (USD)
Geographic Coordinates
41° 51' N Latitude / 87° 39' W Longitude
International Dialing Code
+1