Is 12 O'clock in the afternoon am or pm?

The 12-hour clock method defines all 24 hours of the day using numbers 1 to 12, followed by am or pm.

Answer: 12 O'clock in the afternoon is pm.

Ante meridiem is generally referred to as AM, am, a.m., or A.M.

Whereas PM, pm, p.m., or P.M. are typically abbreviated post meridiem.

Explanation:

The abbreviation 'AM' stands for ante meridiem (before the meridian line has crossed the Sun or the time between midnight and 11.59 in the morning)

PM stands for post-meridiem (after the meridian line has crossed the Sun or the time between noon and 11.59 at night).

5 AM is early in the morning and 5 PM is late in the evening; 1 AM is one hour after midnight, and 11 PM is one hour before midnight.

12 AM and 12 PM can also be addressed as 12 midnight and 12 noon

Thus, 12 O'clock in the afternoon is the same as 12 noon which is also known as 12 PM.