Is there a space between time and PM?

No, there should not be a space between the time (numerical value) and 'PM'.

Proper Formatting for Time with AM/PM

When writing times using 'AM' or 'PM', established editorial guidelines, such as those used by Monash University, emphasize a direct connection between the numeral and the period indicator. This means the number and the 'AM' or 'PM' designation should not be separated by a space. This convention ensures clarity and consistency in written communication.

Why No Space Between Time and AM/PM?

The absence of a space directly links the numerical hour to its corresponding part of the day, making it a single, cohesive unit. This practice promotes conciseness and avoids any ambiguity that a space might introduce. For instance, 5PM clearly indicates five o'clock in the evening, without any visual break, forming a standard and easily recognizable format.

Correct Time Notation Examples

To illustrate the correct usage of time notation as per these guidelines, observe the following examples:

• Correct Formats:
  • 9AM
  • 3.30PM
  • 12PM (for noon)
  • 12AM (for midnight)
  • 7.00AM
• Incorrect Formats (avoid these):
  • 9 AM (contains a space)
  • 3:30 PM (contains a space and a colon instead of a full stop for minutes)

Additional Punctuation Rules for Time

Beyond the spacing between the number and 'AM'/'PM', proper time formatting also involves other specific punctuation rules to maintain clarity and adhere to editorial standards. Key guidelines include:

• No Periods in AM/PM: The abbreviations 'AM' and 'PM' should be written without full stops. Use AM and PM, not A.M. or P.M..
• Full Stop for Hour-Minute Separation: When separating hours and minutes, use a full stop (period) rather than a colon. For example, use 10.45AM instead of 10:45AM.

Summary Table: Time Formatting Guidelines

To provide a quick reference for correct time notation, the table below summarizes the key points:

Element	Correct Usage	Incorrect Usage
Space (Number-AM/PM)	5PM	5 PM
Periods (AM/PM)	AM, PM	A.M., P.M.
Hour-Minute Separator	10.30AM	10:30AM

Adhering to these guidelines ensures consistent and professional presentation of time in written content.