One of the problems in learning English is the correct use of prepositions.
Read a lot.
Listen a lot.
Write a lot.
To record the correct position of the prepositions in your mind.
Preposition “on“
Talking about time, for specific dates and days:
On vacation
On your birthday
On Fourth of April
On holiday
On sunday
Talking about positon, location or place:
On air
On the radio
On the floor
On the left
