Pastime (noun)

1. An activity done regularly in one's leisure time for pleasure.
2. Something that one does for pleasure or entertainment in one's spare time.

Origin:

Late middle english: from old french passtemps, from passer "spend" + temps "time".

Examples:

1. Reading is his favorite pastime.
2. Gardening is her favorite pastime.
3. Fishing is a popular pastime.
4. Hiking is a popular pastime.
5. Watching television is a common pastime.