Massachusetts state law regarding student absence due to religious beliefs has been adopted by the Institute as follows:
Any student who is unable to attend classes or participate in any examination, study, or work requirement on a particular day because of their religious beliefs is excused from any such activity. The student will be given the opportunity to make up the work that was missed, provided that the makeup work does not create an unreasonable burden upon MIT. The Institute will not level fees or charges of any kind when allowing the student to make up missed work. In addition, no adverse or prejudicial effects will result because students have made use of these provisions.
The following partial listing is prepared in conjunction with the MIT Office of Religious, Spiritual, and Ethical Life. For more information, please visit the "Welcoming Religious Identities" page on the DSL website.
Academic Year 2025-2026
2025
| September | 22-24 | Mon (sundown)-Wed (sundown) | Rosh Hashanah |
| 28 | Sunday | First Day of Durgapuja | |
| October | 1-2 | Wed (sundown)-Thu (sundown) | Yom Kippur |
| 2 | Thursday | Vijayadashami | |
| 6-8 | Mon (sundown)-Wed (sundown) | Sukkot begins | |
| 13-15 | Mon (sundown)-Wed (sundown) | Shemini Atzeret/Simchat Torah | |
| 20 | Monday | Diwali | |
| 22 | Wednesday | Birth of the Bab | |
| 23 | Thursday | Birth of Baha'u'llah | |
| November | 1 | Saturday | All Saints' Day |
| 11 | Tuesday | Lhabab Duchen | |
| 27 | Thursday | National Day of Mourning | |
| December | 8 | Monday | Bodhi Day |
| 8 | Monday | Immaculate Conception |
2026
| February | 17 | Tuesday | Lunar New Year |
| 17 | Tuesday (sundown) | Ramadan begins | |
| 18 | Wednesday | Ash Wednesday | |
| March | 18 | Wed (sundown) | Ramadan ends |
| 18-19 | Wed (sundown)-Thu (sundown) | Eid-al-Fitr | |
| 20 | Friday | Nowruz (Zoroastrian) | |
| 26 | Thursday | Rama Navami | |
| April | 1-3 | Wed (sundown)-Fri (sundown) | Passover begins |
| 3-5 | Friday/Sunday | Good Friday/Easter (Western) | |
| 7-9 | Tue (sundown)-Thu (sundown) | Passover ends | |
| 10-12 | Friday/Sunday | Good Friday/Easter (Orthodox) | |
| 21 | Tuesday | First day of Ridvan | |
| 29 | Wednesday | Ninth day of Ridvan | |
| May | 1 | Friday | Vesak |
| 2 | Saturday | Twelfth day of Ridvan | |
| 14 | Thursday | Ascension Thursday | |
| 21-23 | Thu (sundown)-Sat (sundown) | Shavuot | |
| 24 | Sunday | Declaration of the Bab | |
| 29 | Friday | Ascension of Baha'u'llah |
Academic Year 2026-2027
2026
| September | 11-13 | Fri (sundown)-Sun (sundown) | Rosh Hashanah |
| 20-21 | Sun (sundown)-Mon (sundown) | Yom Kippur | |
| 25-27 | Fri (sundown)-Sun (sundown) | Sukkot begins | |
| October | 2-3 | Fri (sundown)-Sat (sundown) | Shemini Atzeret |
| 3-4 | Sat (sundown)-Sun (sundown) | Simchat Torah | |
| 16 | Friday | First Day of Durga Puja | |
| 20 | Tuesday | Vijayadashami | |
| November | 1 | Sunday | All Saints' Day |
| 8 | Sunday | ||
| 10 | Tuesday | Birth of the Báb | |
| 11 | Wednesday | Birth of Baha'u'llah | |
| 26 | Thursday | National Day of Mourning | |
| December | 8 | Tuesday | Bodhi Day |
| 8 | Tuesday | Immaculate Conception |
2027
| February | 6 | Saturday | Lunar New Year |
| 8 | Monday | Ramadan begins | |
| 10 | Wednesday | Ash Wednesday | |
| March | 8 | Mon (sundown) | Ramadan ends |
| 9 | Tuesday | Eid-al-Fitr | |
| 20/21 | Saturday/Sunday | ||
| 26/28 | Friday/Sunday | Good Friday/Easter (Western) | |
| April | 15 | Thursday | Rama Navami |
| 21-23 | Wed (sundown)-Fri (evening) | Passover begins | |
| 27-29 | Tue (sundown)-Thu (evening) | Passover ends | |
| 30/May 2 | Friday/Sunday | Good Friday/Easter (Orthodox) | |
| May | 6 | Thursday | Ascension Thursday |
| 16 | Sunday | Eid al-Adha | |
| 19 | Wednesday | Vesak | |
| 24 | Monday | Declaration of the Bab | |
| 29 | Saturday | Ascension of Bahá’u’lláh | |
| June | 10-12 | Thu (sundown)-Sat (sundown) |