40 minutes ago was 12:43 AM, May 19, 2024. In a 24-hour time clock it was 00:43 and 12:43 AM in 12-hour. The key to understanding this time calculation is understanding the time zone and location. For example, 40 minutes ago in EST is . But for this same calculation to PST makes the time . This difference is key for anytime you travel across the globe. Make more calculations below and never miss a date!