on

/ˈɒn/

/ˈɑn/, /ˈɔn/

на

used to show that an object is physically in contact with or attached to a surface or object

на, в

used to show a day or date

Examples

1. The festival is on from the 10th to the 20th of August.

2. The chef sprinkled a generous amount of roe on the dish.

3. The children happily enjoyed their aspartame-sweetened popsicles on a hot summer day.

4. The guide at the art gallery provided insightful commentary on the artworks.