Is it okay for a PhD student to go on holidays in breaks? I am a first year STEM PhD student in a US university, but I come from a different country. I took a couple of weeks off in this winter break to travel within the US, as it was too expensive to visit my home country.

Now, I have two options -

1. To visit my home country in the next winter (2016-17) for around a month.
 2. To visit my home country in the coming summer (2016) for a short period (say 2 weeks) and get back to work AND to go back again in the next winter for around a month.

Now, the problem with 1 is that there is still a year to go (well, almost a year), and so there is a possibility of being homesick.
So, there is 2. However, I am concerned if it will be seen as I am slacking off / going on holidays too many times etc. Now, I obviously understand that I should discuss this with my advisor and s/he should take the decision, but I am concerned if this is even a reasonable discussion topic (as opposed to the idea being so preposterous that there is no point even asking, and I should just stick to 2)

Note that even if I go on a short holiday in the summer, I plan to spend most of the summer doing research at my university.

So, tl;dr:
Is going on holidays in 3 consecutive breaks considered reasonable? Or is it too preposterous?
Do you have an adviser? Have you talked to them about this? Most should be fine with you taking some time off to visit your family, but you should probably discuss longer breaks with them to work out all the details.