Basic prepositions

IN	We use in with months - in May seasons - in winter country - in Greece city or town names - in New York times of the day - in the morning, afternoon or evening BUT at night!
ON	We use "on" with specific days - on Friday, on New Year's Day, on April the 19th American English - "on the weekend OR on weekends"
AT	We use "at" with specific times - at 7 o'clock, at 6.15 at night specific places in a city - at school British English - "at the weekend OR at weekends"
TO	We use "to" with verbs which show movement such as go and come - He goes to school. She returned to the store. They are coming to the party tonight.