In my off time vs on my off time

Hi,

Which one sounds natural to native speakers?

  1. In my off-time I do various home projects.
  2. On my off-time I do various home projects.

Thanks.

I wouldn’t use either of those, but ‘in’ is the best preposition.

In my time off, I do various home projects.

I see,
Cheers!

“In my off time” is definitely the best. I think “in my free time” is maybe more used.

‘In my off time’ is not used in the UK.

It’s used in the US - meaning time off from work or other responsibilities.