1. His birthday is (in/on) the 2nd of September. 2. What are you doing (at/on) Saturday? 3. I saw him (in/at) spring last time. 4. Come to my place (in/on) Sunday morning. 5. I will come back (in/at) half an hour. 6. He usually watched TV (on/in) the morning. 7. The meeting will start (in/at) midday.