Vacations, work time, duration. How to?

One more newbee question.
When I used another Gantter application I needed to fill in my personal work calendar, i.e, when I am free for work. Every task had a duration (start, end date) and also contained work time for just that specific task. When we worked on each task we filled in how much work we have done (in hours) in each task. I have mentioned 4 variables now. Personal calendar, duration, work time in each task, work performed.
Problem: I cannot find where to put in my vacation during summer. Is there any personal calendar? Perhaps I’m totally lost but…