Question 1 with 1 blankSon las 8:15 p.m. en Nairobi. ¿Qué hora es en Sydney? Son las a.m. en Sydney. Question 2 with 1 blankSon las 6:45 a.m. en Toronto. ¿Qué hora es en Londres? Son las a.m. en Londres. Question 3 with 1 blankSon las 5:20 p.m. en Moscú. ¿Qué hora es en México, D.F.? Son las a.m. en México, D.F. Question 4 with 1 blankSon las 9:55 p.m. en Tokio. ¿Qué hora es en Madrid? Son las p.m. en Madrid. Question 5 with 1 blankSon las 11:10 a.m. en Quito. ¿Qué hora es en San Francisco? Son las a.m. en San Francisco.

The Earth rotates 360 degrees in 24 hours, so by definition the earth globe was divided in 24 time zones, separating them each one 15 degrees. The zero degree is known as Greenwich Mean Time and there are 12 time zones to the east and 12 time zones to the west. According to your point of reference, each time zone to the east adds 1 hour, meaning that is 1 hour later, and each time zone to the west adds 1 hour, meaning that is 1 hour earlier. So, to find the exact time in a specific city knowing the time from another city you need to know the Greenwich Mean Time (GMT) of each city and find the difference between them, e.g. It is 8:15 p.m in Nairobi, What time is in Sydney? Ans. Nairobi is on GMT+3 and Sydney is on GMT+10, so the difference between them is 10 – 3 = 7. This means 7 hours to the east which it means that Sydney is 7 hours later than Nairobi, 3:15 p.m. Another example: It is 5:20 p.m. on Moscow. What time is in Mexico D.F? Ans. Moscow is on GMT+3 and Mexico D.F. is on GMT-5, so the difference between them is -5 – 3 = -8. This means 8 hours to the west which it means that Mexico D.F is 8 hours earlier that Moscow, 9:20 a.m.