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In - On - At

1. The Americans celebrate the Declaration of Independece July 4th.
2. Christmas is always December 25th.
3. It is usually hot summer.
4. My little sister was born Sunday at 10 o'clock.
5. There is an interesting programme TV Mondays 6 the evening.
6. weekends, I feel lazy!
7. Shakespeare was born the sixteenth century.