1. It's 8.25 now. The train leaves at 8.30. - The train leaves in five minutes.
2. It's Monday today. I'll call you on Thursday. - I'll call you in three days.
3. Today is 14 June. My exam is on 28 June. - My exam is in two weeks.
4. It's 3 o'clock now. Tom will be here at 3.30. - Tom will be here in half an hour.