Prepositions of Time - at, in, on

At	In	On
Precise time	Months, Years, Centuries (long periods)	Days and Dates
At 3:00	In may	On Sunday
At 5:30	In summer (In the summer)	On Tuesdays
At bedtime	In 2013	On the August 5th
At lunchtime	In the past	On Halloween

For other prepositions of time please look here

Time

1. What time is it? (simple method)
a. Telling time is very simple in English. All you need to do is say the hour as a number, and the minute as a number.
Examples
8:30 is said Eight, Thirty
9:15 is said Nine, Fifteen
6:35 is said Six, Thirty-five
b. if the minutes read ":0x" you must say the time Hour, O'x
Examples
10:05 is said Ten O'Five
3:03 is said Three O'Three
c. if the minutes read ":00" you must say hour O'Clock
Example
5:00 is Five O'Clock
10:00 is Ten O'Clock
1:00 is One O'Clock

2. to/past
a. It is also possible to use the phrases Quarter to/past Half past, or minutes to
Examples
8:15 is quarter past eight
8:45 is quarter to nine
8:30 is half past eight
8:10 is ten past eight
8:50 is ten to nine
*It is always acceptable to use the simple method, and in some places it is more common and prefered
3. Special times of the day
a. 12:00 if it refers to the one in the middle of the day, you can either say "mid-day" or Noon
b. 12:00 if it refers to the middle of the night is said "midnight"
4. Self Practice
Please write out the following times in which ever method you prefer.
8:30
9:25
4:45
3:30
6:25
12:00

Ordinal Numbers

1. Ordinal numbers

st	nd	rd	th
1st 21st 31st 41st 151st 1091st	2nd 22nd 32nd 42nd 272nd 592nd	3rd 23rd 33rd 43rd 603rd 1123rd	4th-20th 24th-30th 34th-40th 44th-50th 100th,1000th,10000th… 456th

2. Spelling

 3. Dates

(dates are written in the American form)	the #xx of (month)	(month) #xx
01/21	the 21st of January	January 21st
4/19	the 19th of April	April 19th
12/12	the 12th of December	December 12th
11/26	the 26th of November	November 26th
06/22	the 22nd of June	June 22nd

  *Remember dates are written month/day in America, but in other countries are written day/month

4. Years

Normal-say numbers as set of two numbers

Examples:

1999=19,99 (nineteen ninety-nine)

1776=17,76

1892=18,92

 Normal years (1110-1199, 1210-1299,1310-1399, 1410-1499,1510-1599, 1610-1699,1710-1799, 1810-1899, 1910-1999)

xx01-xx09

Dates that end in 01-09 are said xx "O"1

Examples:

1904= nineteen-o-four

1609=sixteen-o-nine

20xx

the first two digits can either be said twenty, or two thousand

2000-2009 are always said two thousand

Example:

2001=two thousand one

2009=two thousand nine

2010-2099 you can either say these dates as twenty xx or two thousand xx

Example:

2011= 20,11 or two thousand eleven 

2020= 20,20 or two thousand twenty