Always start something one minute before or one minute after midnight and avoid the confusion. When planning a call between EST and PST, you need to consider time difference between these time zones. I really can't see where all the misunderstandig comes from - it never used to be an issue at all. Most locations are observing Daylight Saving Time. EST stands for Eastern Standard Time. The simple answer is 12AM is midnight and 12PM is noon. EST is 3 hours ahead of PST. Join Yahoo Answers and get 100 points today. So, when it is 12:00 am EST1:00 am EST2:00 am EST3:00 am EST4:00 am EST5:00 am EST6:00 am EST7:00 am EST8:00 am EST9:00 am EST10:00 am EST11:00 am EST12:00 pm EST1:00 pm EST2:00 pm EST3:00 pm EST4:00 pm EST5:00 pm EST6:00 pm EST7:00 pm EST8:00 pm EST9:00 pm EST10:00 pm EST11:00 pm EST it will be 5:00 am in Lagos6:00 am in Lagos7:00 am in Lagos8:00 am in Lagos9:00 am in Lagos10:00 am in Lagos11:00 am in Lagos12:00 pm in Lagos1:00 pm in Lagos2:00 pm in Lagos3:00 pm in Lagos4:00 pm in Lagos5:00 pm in Lagos6:00 pm in Lagos7:00 pm in Lagos8:00 pm in Lagos9:00 pm in Lagos10:00 pm in Lagos11:00 pm in Lagos12:00 am in Lagos1:00 am in Lagos2:00 am in Lagos3:00 am in Lagos4:00 am in Lagos. The time just east of the International Date Line that corresponds to 12:00 Pacific Standard Time is 8:00 in the morning. The time just east of the International Date Line that corresponds to 12:00 Pacific Standard Time is 8:00 in the morning. Fact Check: What Power Does the President Really Have Over State Governors? Had we suggested at school, that 12 noon was PM and midnight was AM, we'd have been laughed at by both teacher and classmates, as it would have beeen clear we'd missed the principle completely. In theory, each time zone consists of 15 degrees of longitude and varies by one hour from the previous one, but the boundaries of a time zone are often irregular to accommodate international borders. 12:00pm appears at the noon location in the list. At home, If I want to record a TV program that ends at Midnight, I set the recorder for 11:59 p.m. to ensure that the recorder does not get confused. Nobody really cares about the post-meridiem and ante-meridiem garbage. Clearly 12PM is twelve hours after noon and 12AM is twelve hours before noon, both of which are midnight. 12:00 noon is 12:00 M , 11:59 before noon is 11:59 am ., and 12:01 after noon is 12:01 pm , because M means meridian and meridian is an imaginary line called meridian "0" or Greenwich , this meridian mark 12:00 noon , all points on the surface of the earth that are below this meridian from pole to pole meet 12:00 noon. Noon has always been 12 AM until the confusion in very recent years, with the advent of compterised clocks, digitised timetables & the rest. Spanish: ET - Tiempo del Este, ET - Zona Sureste the meridian of Greenwich or "0" is static means that meridian "0" does not move with the rotation of the earth if you look at our planet from the sun the rotation of the earth is from left to right the line in the center of the earth from north to south points on the surface of the earth that are to the left of the line or the meridian "0" are on time AM when the rotation of the earth moves these points to the right side of the meridian they change to PM time, when these points of the planet are just beneath the meridian of Greenwich or "0" this is marking the time 12:00 noon or 12:00 M. it is noon because the imaginary line is always facing the planet earth and the sun. Will 5G Impact Our Cell Phone Plans (or Our Health?! It has to be one or the other - and obviously the very last second of the morning, as the clocks ticks 12, is still AM - and the next second, as it ticks 12.00.01, is PM. But 12pm is noon. If you are in EST, the most convenient time to accommodate all parties is between 12:00 pm and 6:00 pm for a conference call or meeting. Still have questions? Time zone convert: Eastern Time (Et) (EST/EDT) to Pacific Time (PDT/PST) Time now in EST and PST. Lagos, Nigeria time is 5 hours ahead of EST. For military and some government contracts, we use the 24-hour system, where Noon is 12:00 and Midnight is 24:00. EST Time IST Time; 01:00 PM Thursday EST ↔ 11:30 PM Thursday IST: 02:00 PM Thursday EST ↔ 12:30 AM Friday IST: 03:00 PM Thursday EST ↔ 01:30 AM Friday IST Is the Coronavirus Crisis Increasing America's Drug Overdoses? This time zone converter lets you visually and very quickly convert EST to Lagos, Nigeria time and vice-versa. The equivalent in the United States of 12:00 PM Pacific Standard Time is as late as 3:00 PM Eastern Standard Time and as early as 9:00 AM Hawaiian Standard Time. All times shown observe local daylight saving time (DST) rules. The abbreviation a.m. stands for ante-meridiem (before the Sun has crossed the line) and p.m. for post-meridiem (after the Sun has crossed the line). Computers should fit the clock, not the other way round. There is no logic in the 12 hour system AM PM, AM stands for ANTE MERIDIAN, and PM for POST MERIDIAN, so at noon the meridian is above your head is not before nor after, if you think Morning and Night then 12 AM is noon if you think 12:30 afternoon the meridian has passed so it should be 12:30 PM so during daytime 12:00 is AM and 12:01 one minute later is PM, looks weird, when writing programs when you enter 12:00 they ask you night or day, Microsoft excel thinks 12:00 PM is noon.