2.  For exact time – “At nine o´clock.”
Meal times. – “ at breakfast.”
Specific parts of the day.- “ at
night”
Festivals. – “at Christmas”
Some time expressions.- “ at the moment, at the weekend…”

3. For days of the week. - On Tuesday.”
For dates. “ On June 23rd.”
For aniversaries. – “ On my birthday”
For special days. – “ on Christmas day.”

4. For months of the year. . –”In July.”.”
For seasons. –”In Autumn.”
For years. –”In 1971.”
For parts of the day ( but AT night). –”In
the evening.”

5. Common expressions with:
This...
Last…
Next...
Every…

6. Common expressions with:
This...
Last…
Next...
Every…