Table of contents

  1. Writing numbers
  2. Number rounding
  3. Generalised numbers
  4. Millions and billions
  5. Page numbers
  6. Plus and minus
  7. Fractions
  8. Percentages
  9. Dates
  10. Time
  11. Ages
  12. Money
  13. Measurements and units
  14. Telephone numbers
  15. Superscript and subscript

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Time

Do not use the 24-hour clock. Do not insert spaces between the number and the letters, and do not use any punctuation except as shown.

9am
10:30am
midday
midnight
11:30pm

Use the same number format for time spans.

8:00am to 5:30pm
1pm to 3pm