| 1/1/1905, Sun | New Year's Day |
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| 1/9/1905, Mon | Epiphany Obs: Actual Observance Day |
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| 3/20/1905, Mon | St. Joseph's Day Obs: Actual Observance Day |
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| 4/16/1905, Sun | Palm Sunday |
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| 4/20/1905, Thu | Maundy Thursday |
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| 4/21/1905, Fri | Good Friday |
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| 4/22/1905, Sat | Holy Saturday |
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| 4/23/1905, Sun | Easter |
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| 5/1/1905, Mon | Labor Day |
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| 6/5/1905, Mon | Ascension Obs: Actual Observance Day |
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| 6/26/1905, Mon | Corpus Christi Obs: Actual Observance Day |
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| 7/3/1905, Mon | Sacred Heart Obs |
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| 7/3/1905, Mon | St. Peter-St. Paul Day Obs: Actual Observance Day |
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| 7/20/1905, Thu | Independence Day |
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| 8/7/1905, Mon | Battle of Boyaca |
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| 8/21/1905, Mon | Assumption Obs: Actual Observance Day |
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| 10/16/1905, Mon | Hispanity Day Obs: Actual Observance Day |
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| 11/6/1905, Mon | All Saints' Day Obs: Actual Observance Day |
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| 12/8/1905, Fri | Immaculate Conception |
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| 12/24/1905, Sun | Christmas Eve |
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| 12/25/1905, Mon | Christmas Day |
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| 12/31/1905, Sun | New Year's Eve |
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