Convert between 12-hour and 24-hour time

key notes :

🎯 1. Understanding the Basics

• 12-hour clock: Divides the day into two parts:
  • AM (Ante Meridiem) – from 12:00 midnight to 11:59 in the morning
  • PM (Post Meridiem) – from 12:00 noon to 11:59 in the evening
• 24-hour clock: Runs continuously from 00:00 (midnight) to 23:59 (11:59 PM) — no need for AM or PM.
  • Example: 3:00 PM becomes 15:00.

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⏰ 2. Converting 12-hour to 24-hour Time

• For AM times:
  • If the hour is 12 AM (midnight), write it as 00:00.
  • Other AM times stay the same — just add a 0 before single digits (e.g., 7:30 AM → 07:30).
• For PM times:
  • Add 12 to the hour (e.g., 2:00 PM → 14:00).
  • 12 PM (noon) stays as 12:00.

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🔁 3. Converting 24-hour to 12-hour Time

• For times between 00:00 and 11:59:
  • Keep the time the same, and add AM (e.g., 09:45 → 9:45 AM).
• For times between 12:00 and 23:59:
  • Subtract 12 from the hour and add PM (e.g., 18:30 → 6:30 PM).
  • 12:00 stays 12:00 PM (noon).

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📝 4. Examples

12-hour time	24-hour time
7:15 AM	07:15
12:00 PM	12:00
3:45 PM	15:45
12:00 AM	00:00
10:20 PM	22:20

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🔥 5. Quick Tips

• Morning times (AM) → 00:00 to 11:59
• Afternoon/evening times (PM) → 12:00 to 23:59
• Midnight is always 00:00, and noon is always 12:00 in 24-hour format.
• If the hour is less than 10, add a 0 before it in 24-hour time (e.g., 5:00 AM → 05:00).

Learn with an example

Let’s practice!🖊️