I used to follow Grammar Girl but now I have Courtney Anderson (@cney26) who reminds me of proper grammar. The question of 8, eighth, or 8th came up and she quickly referenced me to the following information found on http://data.grammarbook.com/blog/numbers/writing-dates-and-times. To quickly fast forward, the answer is to just use 8.
Writing Dates and Times
The meeting is scheduled for June 30.
The meeting is scheduled for the 30th of June.
We have had tricks played on us on April 1.
The 1st of April puts some people on edge.
Rule: When expressing decades, you may spell them out and lowercase them.
Example: During the eighties and nineties, the American economy grew.
Rule: Whether you express decades using incomplete or complete numerals, do not use an apostrophe between the year and the s. When using an incomplete numeral, use an apostrophe to replace the first two numbers.
During the ’80s, the world’s economy grew.
During the 1980s, the world’s economy grew.
During the ’80’s, the world’s economy grew.
During the 1980’s, the world’s economy grew.
Rule: Spell out the time of day in text even with half and quarter hours. With o’clock, the number is always spelled out.
Example: She gets up at four thirty before the baby wakes up.
Example: The baby wakes up at five o’clock in the morning.
Rule: Use numerals with the time of day when exact times are being emphasized.
Example: Her flight leaves at 6:22 a.m.
Example: Please arrive by 12:30 p.m. sharp.
Rule: Use noon and midnight rather than 12:00 p.m. or 12:00 a.m.
Note: You may use AM and PM rather than a.m. and p.m.
Quiz: Correct or Incorrect?
1. The last outbreak of smallpox occurred in the late 1970’s.
2. Can you get here by 12:00 midnight?
3. Please deliver the package by August 1st, 2009.
2. midnight (leave out 12:00)
3. August 1, 2009