Looking on the internet deeply has found these results:

I have time in my vacation is the most popular phrase on the web.

I have time on my vacation 13 results on the web	I have time in my vacation 1312,000,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Yes, which is why I paid for them myself, and... took my vacation time... to do them. Every time I get a gig like this, they double my vacation time. I have 325 days of unused vacation time. I will see you in five hours. I haven't had a lot of vacation time the last three years. I have some vacation time coming. I have a lot of unused vacation time. Over a month I've been here, using all my vacation time and then some. I've got vacation time we never cashed in, and I have an appointment with an employment agency this afternoon.	It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

I have time on my vacation

13 results on the web

I have time in my vacation

1312,000,000 results on the web

More popular!

Yes, which is why I paid for them myself, and... took my vacation time... to do them.
Every time I get a gig like this, they double my vacation time.
I have 325 days of unused vacation time. I will see you in five hours.
I haven't had a lot of vacation time the last three years.
I have some vacation time coming.
I have a lot of unused vacation time.
Over a month I've been here, using all my vacation time and then some.
I've got vacation time we never cashed in, and I have an appointment with an employment agency this afternoon.

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.