What does Es la una en punto mean?

it means 1 o'clock on the dot

"on the dot" or "precisely"/ "exactly" = same thing.

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"Es la una en punto" is a Spanish phrase that translates to "It is one o'clock exactly" in English.

In Spanish, when indicating the time in a specific hour, the phrase "es la una en punto" is used. It literally means "it is one on the dot." The phrase "en punto" is added to specify that it is exactly the given hour without any minutes.

To understand this phrase, it is helpful to have a basic understanding of Spanish numbers and time expressions.