This document provides guidelines for using prepositions of time such as "at", "on", and "in" followed by time expressions, dates, days, and parts of the day. It distinguishes between using "at" for exact times, meals, festivals, and some expressions like "at the moment"; using "on" for days of the week, dates, anniversaries, and special days; and using "in" for months, seasons, years, and parts of the day except night which uses "at". It also notes common expressions can be used with this, last, next, and every.

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…