1 Using dates:
Examples: 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.
2. When expressing decades, you may spell them out and lowercase them.
Example: During the eighties and nineties, the U.S. economy grew.
3. If you wish to express decades using incomplete numerals, put an apostrophe before the incomplete numeral but not between the year and the s.
Correct: During the '80s and '90s, the U.S. economy grew.
4. You may also express decades in complete numerals. Again, don't use an apostrophe between the year and the s.
Example: During the 1980s and 1990s, the U.S. economy grew.