One thing a lot of people have problems with when describing time and action relationships is choosing the right preposition. Here is a quick guide.
on + date or day
I will arrive on 26th September.
Could you meet me on Thursday?
in + time period, such as seasons, times of day and months
Let’s meet in June.
Could you arrive early in the morning?
It’s very humid in Summer.
at + time
The meeting starts at noon.
Would you be able to get the train at seven o’clock?
no preposition with this ~ / tomorrow ~ / next ~ / today
Let’s meet this Friday.
I’m busy tomorrow.
What are you doing next week?
Do you have time to talk today?