The preposition
on is
often used in time
phrases.
When
on
is used in this
way, it is followed
by noun
phrases
that show a specific
calendar time.
Examples:
I'll
see you on Tuesday.
I'm not going to be here
on
February 23rd.
He went there on
the
15th of January.
U.S. Independence Day is celebrated
on
July 4th.
The Winter Solstice is
on
December 21st.
She always has a party
on
her birthday.
____________________________________
Special
Notes:
| 1. |
|
Do not use
on with
general clock or
calendar
times:
wrong: *I'll see you on 10 o'clock
tomorrow
morning.
wrong: *U.S.
Independence Day is
on
July. |
| |
|
|
| 2. |
|
The fixed expression on
time
means
"at the
scheduled time."
Examples:
The
meeting was scheduled to begin
at
9:00
AM. It
began at 9:00 AM.
The meeting began
on time.
The plane was scheduled to leave at
12:10
PM. It
left at 12:15, not at 12:10.
The plane didn't leave on
time. |
| 
