Final answer:
The Spanish phrase for 'to go on a day trip' is 'hacer una excursión'.
Step-by-step explanation:
In Spanish, the phrase 'to go on a day trip' can be translated as 'hacer una excursión'. 'Hacer' means 'to do' or 'to make', and 'una excursión' means 'a day trip'.
For example, you could say 'Vamos a hacer una excursión al parque nacional' (We are going on a day trip to the national park).
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