Prepositions of time

Different time expressions need different prepositions. Have a look at this table:

Preposition	Time expression	Examples
in	months	in July; in September
	years	in 1985; in 1999
	seasons	in summer; in the summer of 69
	parts of the day	in the morning; in the afternoon; in the evening
at	part of the day	at night
	time	at 6 o’clock; at midnight
	periods	at Easter; at the weekend
on	days of the week	on Sunday; on Friday
	dates	on the 25th of December*
	special holidays	on Good Friday; on Easter Sunday; on my birthday

Look at these examples:

• I have a meeting at 9am.
• The shop closes at midnight.
• In England, it often snows in December.
• Do you work on Mondays?
• Her birthday is on 20th November.
• Now, complete exercise 1, exercise2, exercise 3 and exercise 4