Usually not. We might say "last Saturday I went to the countryside and did a lot of fun things - it felt like a vacation!" NOTE: I also changed "many" to "a lot" as I think it sounds more natural in this case.

As an aside, think of 'vacation' as 'vacating' That's why it refers to leaving ones home for some extended period of time.

In the United States, a "vacation" usually means a trip away from home, taken for pleasure. A weekend would only be a "vacation" if you left your home. Often, a "vacation" is a period of two or three weeks. If you are only leaving for the weekend, one might say "a weekend vacation," "a mini-vacation," or simply "we're going away for the weekend." (The fundamental meaning of the word is to go away from a place, such as your home, leaving it empty. When school closes for the summer and the students leave, it is a "school vacation" because the school is empty of students).

Vacation is used far more in America but I believe it would be a holiday, more than a weekend away and not for a day trip. I'm sure you'll get a better answer though ;)