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Caltech Holiday Observances for 2021
| 1 | Friday | January 1 | New Year's Day |
| 2 | Monday | January 18 | Martin Luther King Day |
| 3 | Monday | February 15 | President's Day |
| 4 | Monday | May 31 | Memorial Day |
| 5 | Monday | July 5 | Independence Day Observed |
| 6 | Monday | September 6 | Labor Day |
| 7 | Thursday | November 25 | Thanksgiving Day |
| 8 | Friday | November 26 | Day after Thanksgiving |
| 9 | Thursday | December 23 | Floating Holiday 1 |
| 10 | Friday | December 24 | Christmas Day Observed |
| 11 | Monday | December 27 | Floating Holiday 2 |
| Tuesday | December 28 | Special Release Day 1 | |
| Wednesday | December 29 | Special Release Day 2 | |
| Thursday | December 30 | Special Release Day 3 | |
| 12 | -- | -- | Personal Holiday |
NOTE: Friday, December 31 is the observance of the New Year's Holiday and counts as a holiday in calendar year 2022.
Caltech Holiday Observances for 2022
| 1 | Friday | December 31, 2021 | New Year's Day Observed (counts as 2022 holiday) |
| 2 | Monday | January 17 | Martin Luther King, Jr. Day |
| 3 | Monday | February 21 | President's Day |
| 4 | Monday | May 30 | Memorial Day |
| 5 | Monday | June 20 | Juneteenth Observed |
| 6 | Friday | July 1 | Floating Holiday 1 |
| 7 | Monday | July 4 | Independence Day |
| 8 | Monday | September 5 | Labor Day |
| 9 | Thursday | November 24 | Thanksgiving Day |
| 10 | Friday | November 25 | Day after Thanksgiving |
| 11 | Monday | December 26 | Christmas Observed |
| 12 | Tuesday | December 27 | Floating Holiday 2 |
| Wednesday | December 28 | Special Release Day 1 | |
| Thursday | December 29 | Special Release Day 2 | |
| Friday | December 30 | Special Release Day 3 | |
| 13 | -- | -- | Personal Holiday |
Caltech Holiday Observances for 2023
| 1 | Monday | January 2 | New Year's Day |
| 2 | Monday | January 16 | Martin Luther King, Jr. Day |
| 3 | Monday | February 20 | President's Day |
| 4 | Monday | May 29 | Memorial Day |
| 5 | Monday | June 19 | Juneteenth |
| 6 | Monday | July 3 | Floating Holiday 1 |
| 7 | Tuesday | July 4 | Independence Day |
| 8 | Monday | September 4 | Labor Day |
| 9 | Thursday | November 23 | Thanksgiving Day |
| 10 | Friday | November 24 | Day after Thanksgiving |
| 11 | Monday | December 25 | Christmas Day |
| 12 | Tuesday | December 26 | Floating Holiday 2 |
| Wednesday | December 27 | Special Release Day 1 | |
| Thursday | December 28 | Special Release Day 2 | |
| Friday | December 29 | Special Release Day 3 | |
| 13 | -- | -- | Personal Holiday |
Caltech Holiday Observances for 2024
| 1 | Monday | January 1 | New Year's Day |
| 2 | Monday | January 15 | Martin Luther King, Jr. Day |
| 3 | Monday | February 19 | President's Day |
| 4 | Monday | May 27 | Memorial Day |
| 5 | Wednesday | June 19 | Juneteenth |
| 6 | Thursday | July 4 | Independence Day |
| 7 | Monday | September 2 | Labor Day |
| 8 | Thursday | November 28 | Thanksgiving Day |
| 9 | Friday | November 29 | Day after Thanksgiving |
| 10 | Tuesday | December 24 | Floating Holiday 1 |
| 11 | Wednesday | December 25 | Christmas Day |
| 12 | Thursday | December 26 | Floating Holiday 2 |
| Friday | December 27 | Special Release Day 1 | |
| Monday | December 30 | Special Release Day 2 | |
| Tuesday | December 31 | Special Release Day 3 | |
| 13 | - | - | Personal Holiday |