| 1/1/1980, Tue | New Year's Day |
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| 1/7/1980, Mon | Epiphany Obs: Actual Observance Day |
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| 3/24/1980, Mon | St. Joseph's Day Obs: Actual Observance Day |
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| 3/30/1980, Sun | Palm Sunday |
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| 4/3/1980, Thu | Maundy Thursday |
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| 4/4/1980, Fri | Good Friday |
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| 4/5/1980, Sat | Holy Saturday |
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| 4/6/1980, Sun | Easter |
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| 5/1/1980, Thu | Labor Day |
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| 5/19/1980, Mon | Ascension Obs: Actual Observance Day |
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| 6/9/1980, Mon | Corpus Christi Obs: Actual Observance Day |
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| 6/16/1980, Mon | Sacred Heart Obs |
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| 6/30/1980, Mon | St. Peter-St. Paul Day Obs: Actual Observance Day |
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| 7/20/1980, Sun | Independence Day |
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| 8/7/1980, Thu | Battle of Boyaca |
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| 8/18/1980, Mon | Assumption Obs: Actual Observance Day |
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| 10/13/1980, Mon | Hispanity Day Obs: Actual Observance Day |
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| 11/3/1980, Mon | All Saints' Day Obs: Actual Observance Day |
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| 12/8/1980, Mon | Immaculate Conception |
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| 12/24/1980, Wed | Christmas Eve |
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| 12/25/1980, Thu | Christmas Day |
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| 12/31/1980, Wed | New Year's Eve |
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