| 1/1/1990, Mon | New Year's Day |
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| 1/8/1990, Mon | Epiphany Obs: Actual Observance Day |
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| 3/19/1990, Mon | St. Joseph's Day Obs |
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| 4/8/1990, Sun | Palm Sunday |
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| 4/12/1990, Thu | Maundy Thursday |
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| 4/13/1990, Fri | Good Friday |
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| 4/14/1990, Sat | Holy Saturday |
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| 4/15/1990, Sun | Easter |
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| 5/1/1990, Tue | Labor Day |
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| 5/28/1990, Mon | Ascension Obs: Actual Observance Day |
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| 6/18/1990, Mon | Corpus Christi Obs: Actual Observance Day |
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| 6/25/1990, Mon | Sacred Heart Obs |
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| 7/2/1990, Mon | St. Peter-St. Paul Day Obs: Actual Observance Day |
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| 7/20/1990, Fri | Independence Day |
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| 8/7/1990, Tue | Battle of Boyaca |
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| 8/20/1990, Mon | Assumption Obs: Actual Observance Day |
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| 10/15/1990, Mon | Hispanity Day Obs: Actual Observance Day |
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| 11/5/1990, Mon | All Saints' Day Obs: Actual Observance Day |
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| 12/8/1990, Sat | Immaculate Conception |
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| 12/24/1990, Mon | Christmas Eve |
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| 12/25/1990, Tue | Christmas Day |
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| 12/31/1990, Mon | New Year's Eve |
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