1. | Sarah starts work at 8:15am. | | |
| Sarah starts work on 8:15am. | | |
| Sarah starts work in 8:15am. | | |
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2. | Doors open on 19:00. | | |
| Doors open at 19:00. | | |
| Doors open in 19:00. | | |
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3. | The finals will take place from 1:30 pm on Sunday. | | |
| The finals will take place from 1:30 pm at Sunday. | | |
| The finals will take place from 1:30 pm in Sunday. | | |
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4. | I'll see you in Monday. | | |
| I'll see you at Monday. | | |
| I'll see you on Monday. | | |
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5. | This may start in July. | | |
| This may start on July. | | |
| This may start at July. | | |
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6. | We are confident it will be on April. | | |
| We are confident it will be in April. | | |
| We are confident it will be at April. | | |
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7. | I can't sleep at night. | | |
| I can't sleep on night. | | |
| I can't sleep in night. | | |
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8. | I have a meeting in the morning. | | |
| I have a meeting on the morning. | | |
| I have a meeting at the morning. | | |
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9. | Can I change into it on the evening? | | |
| Can I change into it in the evening? | | |
| Can I change into it at the evening? | | |
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10. | I'll tell you in Monday morning. | | |
| I'll tell you on Monday morning. | | |
| I'll tell you at Monday morning. | | |
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