Is a lady allowed to be on vacation when she has yurzeit after her father?
There is a difference between the first yahrtzeit and the other ones. The minhag is that on the first yahrtzeit the avel acts like during the aveilus year. However for all the other yahrtzeits he just doesn’t go to a chasuna, however vacationing is permitted then.
Rama Y:D 395-3, Pischei Teshuva Y:D 391-8, Pri Megadin M:Z 444-9, Chochmas Odom 171-11, KItzur Shulchan Aruch 1221-7.