12:00 AM or 00:00 AM: Which One is Correct?
When it comes to writing times in the 24-hour clock format, there is often confusion between 12:00 AM and 00:00 AM. Both formats are commonly used, but which one is correct?
The 12-Hour Clock vs. the 24-Hour Clock
In the 12-hour clock, the day is divided into two 12-hour periods: AM (ante meridiem) and PM (post meridiem). The clock starts at 12:00 AM and ends at 11:59 PM. This format is commonly used in everyday life, especially in informal settings.
On the other hand, the 24-hour clock is used in formal and technical contexts, such as in aviation, medicine, and the military. In this format, the clock starts at 00:00 and ends at 23:59.
The Correct Format: 00:00 AM or 12:00 AM?
According to the International Organization for Standardization (ISO), the correct format for midnight is 00:00. This is because the 24-hour clock is a continuous cycle, and midnight marks the beginning of a new day.
In contrast, 12:00 AM is a relic of the 12-hour clock and is not officially recognized as a valid format for midnight. While it is commonly used in informal settings, it can cause confusion in formal and technical contexts.
When to Use Each Format
- Use 00:00 in formal and technical contexts, such as in scientific papers, technical reports, and military communications.
- Use 12:00 AM in informal settings, such as in casual conversations, social media, and everyday writing.
Conclusion
In conclusion, while both 12:00 AM and 00:00 AM are widely used, the correct format for midnight is 00:00. This format is officially recognized by the ISO and is used in formal and technical contexts. However, in informal settings, 12:00 AM is still widely accepted and used. It's essential to understand the difference between these formats to avoid confusion and ensure clarity in communication.
